- Upgrade org_pubref_rules_protobuf to 0.7.2 it has fixes needed for objc_proto_lib

- Add com_google_protobuf_objc which uses a more recent version that has better support for Obj-C
- Ran buildifier on it. Sorry vim does that automatically and it will keep changing things everytime I edit it so I thought it's a good idea.

Change-Id: I764341ea49b84be45ed3c898678112a80135dd5d
ORIGINAL_AUTHOR=Haris Andrianakis <candrian@google.com>
GitOrigin-RevId: 4965b344abbb3f4dae43ca337343333c4f970e54