Move protoc-gen-buf-check-{breaking,lint} to protoc-gen-buf-{breaking,lint}

[bufdev]

protoc-gen-buf-check-{breaking,lint} were deprecated in https://github.com/bufbuild/buf/releases/tag/v0.34.0. This was just a rename, the exact same functionality is available via protoc-gen-buf-{breaking,lint}.

All you need to do throughout the repository is:

• s/protoc-gen-buf-check-breaking/protoc-gen-buf-breaking/
• s/protoc-gen-buf-check-lint/protoc-gen-buf-lint
• s/--buf-check-breaking_out/--buf-breaking_out/
• s/--buf-check-lint_out/--buf-lint_out/

And it should work, including for downloading/installing releases.