Asking Bazel to announce config it finds in bazelrcs to make CI comprehension easier

[cadedaniel]

I had to debug a windows failure last week and it was a major pain. I managed to create the BK environment to iterate faster. This flag helped me understand what Bazel does in CI. See this slack thread for more context.

Example output on windows:

(22:29:21) INFO: Reading 'startup' options from c:\users\containeradministrator\.bazelrc: --output_user_root=C:/tmp, --output_user_root=c:/tmp
(22:29:21) INFO: Options provided by the client:
  Inherited 'common' options: --isatty=0 --terminal_columns=80
(22:29:21) INFO: Options provided by the client:
  'build' options: --python_path=C:/Miniconda3/python.exe
(22:29:21) INFO: Reading rc options for 'build' from c:\install\ray\.bazelrc:
  'build' options: --enable_platform_specific_config --compilation_mode=opt --per_file_copt=\.pb\.cc$@-w --per_file_copt=-\.(asm|S)$,external/.*@-w --per_file_copt=-\.(asm|S)$,external/com_github_grpc_grpc/.*@-DGRPC_BAZEL_BUILD --http_time
out_scaling=5.0 --verbose_failures --strict_java_deps=off
(22:29:21) INFO: Reading rc options for 'build' from c:\users\containeradministrator\.bazelrc:
  'build' options: --config=ci --announce_rc --config=ci --remote_upload_local_results=false
(22:29:21) INFO: Found applicable config definition build:ci in file c:\install\ray\.bazelrc: --color=yes --curses=no --keep_going --progress_report_interval=100 --show_progress_rate_limit=15 --show_task_finish --ui_actions_shown=1024 --sh
ow_timestamps
(22:29:21) INFO: Found applicable config definition build:ci in file c:\install\ray\.bazelrc: --color=yes --curses=no --keep_going --progress_report_interval=100 --show_progress_rate_limit=15 --show_task_finish --ui_actions_shown=1024 --sh
ow_timestamps
(22:29:21) INFO: Found applicable config definition build:windows in file c:\install\ray\.bazelrc: --action_env=PATH --cxxopt=/std:c++17 --enable_runfiles --attempt_to_print_relative_paths --experimental_repository_cache_hardlinks --incomp
atible_strict_action_env --color=yes
(22:29:22) INFO: Current date is 2022-09-26
(22:29:22) Loading:
(22:29:22) Loading: 0 packages loaded

[simon-mo]

upon second thought, can we only enable this in CI environment? devs also run this script locally, which can be spammy (?). You can check the existence of env var CI

[cadedaniel]

The failures all appear unrelated to this change. @simon-mo can you merge this?