feat(ts_proto_library): expose protoc_gen_options on ts_proto_library

[mattem]

Exposes a dict for setting options on protoc_gen on the ts_proto_library

---

Changes are visible to end-users: yes

• Searched for relevant documentation and updated as needed: yes
• Breaking change (forces users to change their own code or config): no
• Suggested release notes appear below:

Allow custom options to be set on ts_proto_library for protoc-gen.

Test plan

• Manual testing; please provide instructions so we can reproduce:

Run locally patched in Silo.

[aspect-workflows]

Test

All tests were cache hits

81 tests (100.0%) were fully cached saving 12s.

---

Buildifier      Format

[jbedard]

Can we make this an explicit argument in the public macro and document it there?