!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>

x/evm/spec/04_transactions.md

@@ -14,7 +14,7 @@ An EVM state transition can be achieved by using the `MsgEthereumTx`. This messa
 type MsgEthereumTx struct {
  // inner transaction data
  Data *types.Any `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"`
- // encoded storage size of the transaction
+ // DEPRECATED: encoded storage size of the transaction
  Size_ float64 `protobuf:"fixed64,2,opt,name=size,proto3" json:"-"`
  // transaction hash in hex format
  Hash string `protobuf:"bytes,3,opt,name=hash,proto3" json:"hash,omitempty" rlp:"-"`