abci++: add proto fields for enabling vote extensions (#8587)

This pull requests adds the protocol buffer field for the `ABCI.VoteExtensionsEnableHeight` parameter. This proto field is threaded throughout all of the relevant places where consensus params are used and referenced.

This PR also adds validation of the consensus param updates. Previous consensus param changes didn't depend on _previous_ versions of the params, so this change adds a method for validating against the old params as well.

closes: #8453

test/e2e/runner/evidence.go

@@ -86,9 +86,15 @@ func InjectEvidence(ctx context.Context, logger log.Logger, r *rand.Rand, testne
 				privVals, evidenceHeight, valSet, testnet.Name, blockRes.Block.Time,
 			)
 		} else {
-			ev, err = generateDuplicateVoteEvidence(ctx,
+			var dve *types.DuplicateVoteEvidence
+			dve, err = generateDuplicateVoteEvidence(ctx,
 				privVals, evidenceHeight, valSet, testnet.Name, blockRes.Block.Time,
 			)
+			if dve.VoteA.Height < testnet.VoteExtensionsEnableHeight {
+				dve.VoteA.StripExtension()
+				dve.VoteB.StripExtension()
+			}
+			ev = dve
 		}
 		if err != nil {
 			return err

test/e2e/runner/setup.go

@@ -209,6 +209,7 @@ func MakeGenesis(testnet *e2e.Testnet) (types.GenesisDoc, error) {
 	}
 	genesis.ConsensusParams.Evidence.MaxAgeNumBlocks = e2e.EvidenceAgeHeight
 	genesis.ConsensusParams.Evidence.MaxAgeDuration = e2e.EvidenceAgeTime
+	genesis.ConsensusParams.ABCI.VoteExtensionsEnableHeight = testnet.VoteExtensionsEnableHeight
 	for validator, power := range testnet.Validators {
 		genesis.Validators = append(genesis.Validators, types.GenesisValidator{
 			Name:    validator.Name,