!fix(evm): Fix eth tx hashes in json-rpc responses (#1176)

* Fix eth tx hashes in json-rpc responses

Closes: #1175

- Remove Size_ field
- Validate From/Hash fields in ante handler
- Recompute tx hashes in json-rpc apis to cope with old blocks

Update CHANGELOG.md

remove Size_, validate Hash/From, add unit tests

update spec

Update CHANGELOG.md

Update app/ante/eth.go

populate From in SendRawTransaction

Apply suggestions from code review

keep Size_ field to avoid breaking tx format

* move some validation to ValidateBasic

* move validation to ValidateBasic

* make ToTransaction returns a valid msg

* restructure the protoTxProvider check

* add comment

* workaround tx hash issue in event parsing

* fix integration test

* fix unit test

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

proto/ethermint/evm/v1/tx.proto

@@ -25,7 +25,7 @@ message MsgEthereumTx {
   google.protobuf.Any data = 1;
   // caches
 
-  // encoded storage size of the transaction
+  // DEPRECATED: encoded storage size of the transaction
   double size = 2 [ (gogoproto.jsontag) = "-" ];
   // transaction hash in hex format
   string hash = 3 [ (gogoproto.moretags) = "rlp:\"-\"" ];