provide flag to exclude data at compile time

[ajwerner]

Fixes #2977

[illicitonion]

LGTM, thanks! Let's default this to True to encourage migration :)

[ajwerner]

@illicitonion Thanks for the review. I'm happy with this being default enabled. I fixed the failing tests. Looks like the merge failed due to flakiness downloading bazel:

2024/11/23 18:32:40 could not download Bazel: failed to download bazel: failed to download bazel: could not copy from https://releases.bazel.build/7.3.2/release/bazel-7.3.2-linux-x86_64 to /var/lib/buildkite-agent/.cache/bazelisk/downloads/_tmp/download1571092152: stream error: stream ID 1; INTERNAL_ERROR; received from peer
--
  | Traceback (most recent call last):
  | File "bazelci.py", line 4495, in <module>
  | sys.exit(main())
  | File "bazelci.py", line 4463, in main
  | execute_commands(
  | File "bazelci.py", line 1211, in execute_commands
  | PrepareRepoInCwd(True, initial_setup=True)
  | File "bazelci.py", line 1199, in PrepareRepoInCwd
  | os.environ["OUTPUT_BASE"] = get_output_base(bazel_binary)
  | File "bazelci.py", line 1982, in get_output_base
  | return execute_command_and_get_output(
  | File "bazelci.py", line 2618, in execute_command_and_get_output
  | process = subprocess.run(
  | File "/usr/lib/python3.8/subprocess.py", line 516, in run
  | raise CalledProcessError(retcode, process.args,
  | subprocess.CalledProcessError: Command '['bazel', 'info', 'output_base']' returned non-zero exit status 1.
  ```