(rebase) Support embedded go_proto_library

[blorente]

This is just a rebase and cleanup of this PR from @tingilee : #5567. The feature work is entirely theirs.

fixes #5538, #3328

[blorente]

@mai93 @tpasternak could I have a review on this? I'll give co-author credit to @tingilee on the merge commit, but they don't have their branch open to pushes.

[blorente]

I'll solve the WORKSPACE conflicts, it just never ends so I'll wait for a review before solving them again.

[tpasternak]

LGTM, thank you @blorente

The only concern is about the new dependencies we add (in WORKSPACE.bzlmod). @mai93 can you please confirm they're ok?

[mai93]

The only concern is about the new dependencies we add (in WORKSPACE.bzlmod). @mai93 can you please confirm they're ok?

I think since bazel-gazelle is part of bazelbuild it should be fine.

[tpasternak]

The only concern is about the new dependencies we add (in WORKSPACE.bzlmod). @mai93 can you please confirm they're ok?

I think since bazel-gazelle is part of bazelbuild it should be fine.

It's also google.golang.org/grpc

[tpasternak]

cc @mai93

[mai93]

google.golang.org/grpc

I'm not sure why it should be concerning? cc @blorente if you have more details about it

[tpasternak]

It's not concerning. It's just a new dependency so I always have concerns, sorry

[tpasternak]

Ok, so if there are no issues with dependencies (cc @mai93), then it LGTM. Btw is org_golang_google_grpc actually used anywhere?

[blorente]

I've addressed the comments (and added a comment on why we import grpc). @mai93 @tpasternak , could you please take a look now?