Use golang/protobuf instead of gogo/protobuf

[ebroberson]

• [X] Read the Contributing document.

Summary

gogo/protobuf has been deprecated for years. We should be using up-to-date protobufs provided by google.golang.org/protobuf. In order to fit our use cases, a protobuf plugin (protoc-gen-go-bbs) has been created to catch any customizations we want to add.

Submodule Pull Requests (please do these first)

https://github.com/cloudfoundry/auctioneer/pull/20 https://github.com/cloudfoundry/bbs/pull/109 https://github.com/cloudfoundry/cfdot/pull/14 https://github.com/cloudfoundry/executor/pull/116 https://github.com/cloudfoundry/inigo/pull/50 https://github.com/cloudfoundry/locket/pull/27 https://github.com/cloudfoundry/rep/pull/67 https://github.com/cloudfoundry/route-emitter/pull/50 https://github.com/cloudfoundry/routing-api/pull/69 https://github.com/cloudfoundry/routing-info/pull/8 https://github.com/cloudfoundry/vizzini/pull/15

Backward Compatibility

Breaking Change? No

[linux-foundation-easycla[bot]]

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[geofffranks]

I think this PR needs rebasing off of origin/develop? It seems like stuff it shouldn't need be changing would end up being changed on the develop branch (package definitions, blob info, (re-?)adding a random job property). Otherwise 👍