consensus: add test vector for hasvote (#6469)

## Description

adds a test vector for hasvote in order to extra sure https://github.com/tendermint/tendermint/pull/6287 isnt breaking

proto/tendermint/consensus/message_test.go

@@ -0,0 +1,32 @@
+package consensus_test
+
+import (
+	"encoding/hex"
+	"math"
+	"testing"
+
+	"github.com/gogo/protobuf/proto"
+	"github.com/stretchr/testify/require"
+
+	tmcons "github.com/tendermint/tendermint/proto/tendermint/consensus"
+	tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
+)
+
+func TestHasVoteVector(t *testing.T) {
+	testCases := []struct {
+		msg      tmcons.HasVote
+		expBytes string
+	}{
+		{tmcons.HasVote{1, 3, tmproto.PrevoteType, 1}, "3a080801100318012001"},
+		{tmcons.HasVote{2, 2, tmproto.PrecommitType, 2}, "3a080802100218022002"},
+		{tmcons.HasVote{math.MaxInt64, math.MaxInt32, tmproto.ProposalType, math.MaxInt32},
+			"3a1808ffffffffffffffff7f10ffffffff07182020ffffffff07"},
+	}
+
+	for i, tc := range testCases {
+		msg := tmcons.Message{&tmcons.Message_HasVote{HasVote: &tc.msg}}
+		bz, err := proto.Marshal(&msg)
+		require.NoError(t, err)
+		require.Equal(t, tc.expBytes, hex.EncodeToString(bz), "test vector failed", i)
+	}
+}