This pull request merges in the changes for implementing Proposer-based timestamps into `master`. The power was primarily being done in the `wb/proposer-based-timestamps` branch, with changes being merged into that branch during development. This pull request represents an amalgamation of the changes made into that development branch. All of the changes that were placed into that branch have been cleanly rebased on top of the latest `master`. The changes compile and the tests pass insofar as our tests in general pass.

### Note To Reviewers
 These changes have been extensively reviewed during development. There is not much new here. In the interest of making effective use of time, I would recommend against trying to perform a complete audit of the changes presented and instead examine for mistakes that may have occurred during the process of rebasing the changes. I gave the complete change set a first pass for any issues, but additional eyes would be very appreciated. 

In sum, this change set does the following:
closes #6942 
merges in #6849

This is the interface shared by types that can be used as event data in, for
example, subscriptions via the RPC.

To be compatible with the RPC service, data need to support JSON encoding.
Require this as part of the interface.

Remove the pubsub.Query interface and instead use the concrete query type.
Nothing uses any other implementation but pubsub/query.

* query: remove the error from the Matches method
* Update all usage.

The main change here is to use encoding/json to encode and decode RPC 
parameters, rather than the custom tmjson package. This includes:

- Update the HTTP POST handler parameter handling.
- Add field tags to 64-bit integer types to get string encoding (to match amino/tmjson).
- Add marshalers to struct types that mention interfaces.
- Inject wrappers to decode interface arguments in RPC handlers.

No API changes, merely changes the import path.

* eventbus: plumb contexts

* fix lint

Rework the implementation of event query parsing and execution to
improve performance and reduce memory usage.

Previous memory and CPU profiles of the pubsub service showed query
processing as a significant hotspot. While we don't have evidence that
this is visibly hurting users, fixing it is fairly easy and self-contained.

Updates #6439.

Typical benchmark results comparing the original implementation (PEG) with the reworked implementation (Custom):
```
TEST                        TIME/OP  BYTES/OP  ALLOCS/OP  SPEEDUP   MEM SAVING
BenchmarkParsePEG-12       51716 ns  526832    27
BenchmarkParseCustom-12     2167 ns    4616    17         23.8x     99.1%
BenchmarkMatchPEG-12        3086 ns    1097    22
BenchmarkMatchCustom-12    294.2 ns      64     3         10.5x     94.1%
```

Components:
* Add a basic parsing benchmark.
* Move the original query implementation to a subdirectory.
* Add lexical scanner for Query expressions.
* Add a parser for Query expressions.
* Implement query compiler.
* Add test cases based on OpenAPI examples.
* Add MustCompile to replace the original MustParse, and update usage.

closes #2498 
solves part of #3365

Note: difficult to test the event emit in SwitchToFastSync part, might need to change `stateSyncReactor` to an interface in the `nodeImpl` struct

Adds `block_id` to the `newblock` websocket event

Closes #6028

Migrates the `rpc` package to use new JSON encoder in #4955. Branched off of that PR.

Tests pass, but I haven't done any manual testing beyond that. This should be handled as part of broader 0.34 testing.

* format: add format cmd & goimport repo

- replaced format command
- added goimports to format command
- ran goimports

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

* fix outliers & undo proto file changes

* Rename Tag(s) to Event(s)

- tag was replaced with event, but in some places it still mentions tag, would be easier to understand if we tried to replace it with event to not confuse people.

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

* more  changes from tag -> event

* rename events to compositeKeys and keys

* Apply suggestions from code review

Co-Authored-By: Anton Kaliaev <anton.kalyaev@gmail.com>

* add minor documentation on how composite keys are constructed

* rename eventkey to compositekey

Co-Authored-By: Anton Kaliaev <anton.kalyaev@gmail.com>

* add changelog entry & add info to regenerate confid to changelog entry

and EventDataNewBlockHeader

* Removal of TotalTx & NumTx

- Removed totalTx and numTx

closes #2521

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

* abci proto changes

* proto number fix

* txfilter_test fix

* comments on PR

* further changes

* bring back metrics

* fix indexer

* fix TestBlockMaxDataBytes and TestBlockMaxDataBytesUnknownEvidence

* indexer service back to header

* statistics.go fix

* fix ci

* listen for blocks, not headers

to be able to record txs throughput

* fix TestNetworkNewBlock

* fix tests

* fix tests in types package

* fixes after Anton's review

* fix tests

* bring back `consensus_total_txs` metric

I mistakenly thought it was removed.

* improve changelog

* remove LastBlockTotalTx from state

* docs: remove getNumTxs from BeginBlock Java example

Before we're using it to get a round state in tests. Now it can be done
by calling csX.GetRoundState. We will need to rewrite
TestStateSlashingPrevotes and TestStateSlashingPrecommits, which are
commented right now, to not rely on EventDataRoundState#RoundState
field.

Refs #1527

Distinguish between user events and internal consensus events

* 2871 remove proposalHeartbeat infrastructure

* 2871 add preliminary changelog entry

This commit makes both EventNewBlock and EventNewBlockHeader emit tags
on the event bus, so subscribers can use them in queries.

* fix fastsync may stuck by a wrong block

* fixes from updates

* fixes from review

* Align spec with the changes

* fmt

* add proposer info to EventCompleteProposal

* create separate EventData structure for CompleteProposal

* cant us rs.Proposal to get BlockID because it is not guaranteed to be set yet

* copying RoundState isnt helping us here

* add Step back to make compatible with original RoundState event. update changelog

* add NewRound event

* fix test

* remove unneeded RoundState

* put height round step into a struct

* pull out ValidatorInfo struct. add ensureProposal assert

* remove height-round-state sub-struct refactor

* minor fixes from review

* Introduce EventValidBlock for informing peer about wanted block

* Merge with develop

* Add isCommit flag to NewValidBlock message

- Add test for the case of +2/3 Precommit from the previous round

Refs #1916

Currently the top level directory contains basically all of the code
for the crypto package. This PR moves the crypto code into submodules
in a similar manner to what `golang/x/crypto` does. This improves code
organization.

Ref discussion: https://github.com/tendermint/tendermint/pull/1966

Closes #1956

make BlockMeta Header a non-pointer

Refs #693

This reverts commit d02c5d1e30.

This reverts commit 96a3502

Refs #847

uint64 is considered dangerous. the details will follow in a blog post.