github-ci: add --force-removal-of-dependent-packages

Without this option, a package gets installed with its dependencies
but those do not get removed, causing issues later on with other
packages.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

.github/workflows/entrypoint.sh

@@ -28,5 +28,5 @@ for PKG in /ci/*.ipk; do
 		echo "No test.sh script available"
 	fi
 
-	opkg remove "$PKG_NAME"
+	opkg remove "$PKG_NAME" --force-removal-of-dependent-packages --force-remove
 done