why not enable json type persistence parser?

[zhangkyou]

Version of Cadence server, and client(which language)
This is very important to root cause bugs.

• Server version: 0.23.1
• Client version:
• Client langauge:

Describe the bug
common/constants.go

// Data encoding types
const (
	EncodingTypeJSON     EncodingType = "json"
	EncodingTypeThriftRW EncodingType = "thriftrw"
	EncodingTypeGob      EncodingType = "gob"
	EncodingTypeUnknown  EncodingType = "unknow"
	EncodingTypeEmpty    EncodingType = ""
	EncodingTypeProto    EncodingType = "proto3"
)

the constant encoding types include json type.But in getEncoder/getDecoder(common/presistence/serialization/parser.go) it only enable 'thriftrw' and 'proto3' type.

func getEncoder(encoding common.EncodingType) (encoder, error) {
	switch encoding {
	case common.EncodingTypeThriftRW:
		return newThriftEncoder(), nil
	case common.EncodingTypeProto:
		return newProtoEncoder(), nil
	default:
		return nil, unsupportedEncodingError(encoding)
	}
}

To Reproduce
Is the issue reproducible?

• [Yes]