closes: #8039 

This pull request updates the new ABCI++ protos to use `enum`s in place of `bool`s. `enums` may be preferred over `bool` because an `enum` can be udpated to include new statuses in the future, whereas a `bool` cannot and is fixed as just `true` or `false` over the whole lifecycle of the API.

Minor Typo (nice doc!)

* reorganizing basic concepts, adding outline to navigate easy

* Update spec/abci++/README.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* address problem with snapshot list data type

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

* Update spec/abci++/abci++_basic_concepts_002_draft.md

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* clarify handling events in same-execution model

* remove outdated text about vote extension singing

* clarification apphash state-sync

Co-authored-by: Sergio Mena <sergio@informal.systems>
Co-authored-by: M. J. Fromberger <fromberger@interchain.io>
Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

This change set implements the most recent version of `FinalizeBlock`. 

# What does this change actually contain?

* This change set is rather large but fear not! The majority of the files touched and changes are renaming `ResponseDeliverTx` to `ExecTxResult`. This should be a pretty inoffensive change since they're effectively the same type but with a different name.
* The `execBlockOnProxyApp` was totally removed since it served as just a wrapper around the logic that is now mostly encapsulated within `FinalizeBlock`
* The `updateState` helper function has been made a public method on `State`. It was being exposed as a shim through the testing infrastructure, so this seemed innocuous.
* Tests already existed to ensure that the application received the `ByzantineValidators` and the `ValidatorUpdates`, but one was fixed up to ensure that `LastCommitInfo` was being sent across.
* Tests were removed from the `psql` indexer that seemed to search for an event in the indexer that was not being created.

# Questions for reviewers
* We store this [ABCIResponses](5721a13ab1/proto/tendermint/state/types.pb.go (L37)) type in the data base as the block results. This type has changed since v0.35 to contain the `FinalizeBlock` response. I'm wondering if we need to do any shimming to keep the old data retrieveable?
* Similarly, this change is exposed via the RPC through [ResultBlockResults](5721a13ab1/rpc/coretypes/responses.go (L69)) changing. Should we somehow shim or notify for this change? 


closes: #7658

* Changed the spec text to agreed VoteExtension solution

* Revert "Removed protobufs related to vote extensions"

This reverts commit 4566f1e302.

* Changes to ABCI protocol buffers

* Update spec/core/data_structures.md

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* Update spec/core/data_structures.md

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* Fix dangling link in ABCI++ readme

* Addressed comments

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* remove new_hashes, discuss traceability

* Update spec/abci++/abci++_methods_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_methods_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* Update spec/abci++/abci++_methods_002_draft.md

Co-authored-by: Sergio Mena <sergio@informal.systems>

* quote example traceability

* remove new_hashes from protobuf

Co-authored-by: Sergio Mena <sergio@informal.systems>

Signed-off-by: Thane Thomson <connect@thanethomson.com>
Co-authored-by: Callum Waters <cmwaters19@gmail.com>

This reverts commit 22e8aafa03.

Co-authored-by: Callum Waters <cmwaters19@gmail.com>

Co-authored-by: Josef Widder <44643235+josef-widder@users.noreply.github.com>

Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

Co-authored-by: Josef Widder <44643235+josef-widder@users.noreply.github.com>

Co-authored-by: Josef Widder <44643235+josef-widder@users.noreply.github.com>