Sync PrepareProposal with Spec. Main part (#9158)

* ----start----

* [PARTIAL cherry-pick] ABCI Vote Extension 2 (#6885)

* Cherry-picked #6567: state/types: refactor makeBlock, makeBlocks and makeTxs (#6567)

* [Cherrypicked] types: remove panic from block methods (#7501)

* [cherrypicked] abci++: synchronize PrepareProposal with the newest version of the spec (#8094)

This change implements the logic for the PrepareProposal ABCI++ method call. The main logic for creating and issuing the PrepareProposal request lives in execution.go and is tested in a set of new tests in execution_test.go. This change also updates the mempool mock to use a mockery generated version and removes much of the plumbing for the no longer used ABCIResponses.

* make proto-gen

* Backported EvidenceList's method ToABCI from #7961

* make build

* Fix mockery for Mempool

* mockery

* Backported abci Application mocks from #7961

* mockery2

* Fixed new PrepareProposal test cases in state/execution_test.go

* Fixed returned errors in consensus/state.go

* lint

* Addressed @cmwaters' comment

Co-authored-by: mconcat <monoidconcat@gmail.com>
Co-authored-by: JayT106 <JayT106@users.noreply.github.com>
Co-authored-by: Sam Kleinman <garen@tychoish.com>
Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

test/e2e/app/app.go

@@ -259,7 +259,8 @@ func (app *Application) ApplySnapshotChunk(req abci.RequestApplySnapshotChunk) a
 
 func (app *Application) PrepareProposal(
 	req abci.RequestPrepareProposal) abci.ResponsePrepareProposal {
-	return abci.ResponsePrepareProposal{BlockData: req.BlockData}
+	// None of the transactions are modified by this application.
+	return abci.ResponsePrepareProposal{ModifiedTx: false}
 }
 
 func (app *Application) Rollback() error {