This is to address the following error error thrown when running protobuf-at-head. This is because Bazel needs a C++ compiler to run `tools/codegen/core/gen_upb_api.sh`.
```
Auto-Configuration Error: Cannot find gcc or CC (clang); either correct your path or set the CC environment variable
```
This is not ideal as installing `build-essential` package takes time but let's fix it first and get this installed in the CI image later.
Closes #36628
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36628 from veblush:p-fix-at-head
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| .. | ||
| api_reference | ||
| bazelify_tests | ||
| buildgen | ||
| codegen/core | ||
| debug/core | ||
| distrib | ||
| docker_runners | ||
| dockerfile | ||
| doxygen | ||
| fuzzing | ||
| gce | ||
| gcp/utils | ||
| gource | ||
| http2_interop | ||
| internal_ci | ||
| interop_matrix | ||
| package_hosting | ||
| profiling | ||
| release | ||
| remote_build | ||
| run_tests | ||
| README.md | ||
| bazel | ||
| bazel.rc | ||
| fuzztest.bazelrc | ||
README.md
buildgen: Template renderer for our build system.
distrib: Scripts to distribute language-specific packages and other distribution-related helper scripts.
dockerfile: Docker files to test gRPC.
doxygen: gRPC C/C++ documentation generation via Doxygen.
gce: Scripts to help setup testing infrastructure on GCE.
gcp: Helper scripts for interacting with various services on GCP (like Google container engine, BigQuery etc)
internal_ci: Support for running tests on an internal CI platform.
interop_matrix: Scripts to build, upload, and run gRPC clients in docker with various language/runtimes.
jenkins: Support for running tests on Jenkins.
run_tests: Scripts to run gRPC tests in parallel.
run_tests/performance: See the README for more notes on the performance tests.