Enable proto JSON generally and remove HybridCodec (#6859)

* Remove HybridCodec

* WIP on fixing proto JSON issues

* WIP on fixing proto JSON issues

* WIP on fixing proto JSON issues

* WIP on fixing proto JSON issues

* WIP on fixing proto JSON issues

* Test fixes

* Delete hybrid_codec.go

* Fixes

* Fixes

* Fixes

* Test fixes

* Test fixes

* Test fixes

* Lint

* Sim fixes

* Sim fixes

* Revert

* Remove vesting account JSON tests

* Update CHANGELOG.md

* Lint

* Sim fixes

* Sim fixes

* Docs

* Migrate more amino usages

* Remove custom VoteOption String() and json marshaling

* Fix tests

* Add comments, update CHANGELOG.md

Co-authored-by: Jonathan Gimeno <jgimeno@gmail.com>
Co-authored-by: Alexander Bezobchuk <alexanderbez@users.noreply.github.com>

codec/json.go

@@ -12,7 +12,9 @@ import (
 // ProtoMarshalJSON provides an auxiliary function to return Proto3 JSON encoded
 // bytes of a message.
 func ProtoMarshalJSON(msg proto.Message) ([]byte, error) {
-	jm := &jsonpb.Marshaler{OrigName: true}
+	// We use the OrigName because camel casing fields just doesn't make sense.
+	// EmitDefaults is also often the more expected behavior for CLI users
+	jm := &jsonpb.Marshaler{OrigName: true, EmitDefaults: true}
 	err := types.UnpackInterfaces(msg, types.ProtoJSONPacker{JSONPBMarshaler: jm})
 	if err != nil {
 		return nil, err