Revert default gateway json marshaler

Since version 1.32_4 The gen-grpc-gateway image has changed to use grpc-ecosystem/grpc-gateway v2 which introduced breaking changes, specifically in how requests are marshaled/unmarshaled from proto to json.

In order to allow an easier transition, we've reverted to the default marshaler used prior to this upgrade.
It is now configurable though to use the new marshaler (which is more compatible with the Language guidelines).
Please check out the readme on how to set that option.

In future releases, we will set the new marshaler as default and eventually remove the option to use the old marshaler.

Update protoc-gen-grpc-web from 1.0.3 to 1.0.4

v1.21_1

bump version for ts commit

Release v1.17_0

bump to 1.17 (#101)