chore(python): Add build rule for //google/rpc:rpc-py to prepare for release

- [ ] Regenerate this pull request now. chore: Add build rule for //google/rpc:http_proto to prepare for release chore(python): Add build rule for //google/rpc:http_py_proto to prepare for release PiperOrigin-RevId: 707115605 Source-Link: https://github.com/googleapis/googleapis/commit/bc87a7e1978ce8a14bd1c9ffcfbb310f62d5b8ce Source-Link: https://github.com/googleapis/googleapis-gen/commit/6bc945acec149507ac00225ec95cba65e6031c3f Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiNmJjOTQ1YWNlYzE0OTUwN2FjMDAyMjVlYzk1Y2JhNjVlNjAzMWMzZiJ9