Followup for https://github.com/grpc/grpc/pull/31141.
IWYU and clang-tidy have been "moved" to a separate kokoro job, but as
it turns out the sanity job still runs all of `[sanity, clang-tidy,
iwyu]`, which makes the grpc_sanity jobs very slow.
The issue is that grpc_sanity selects tasks that have "sanity" label on
them and as of now, clang-tidy and iwyu still do.
It can be verified by:
```
tools/run_tests/run_tests_matrix.py -f sanity --dry_run
Will run these tests:
run_tests_sanity_linux_dbg_native: "python3 tools/run_tests/run_tests.py --use_docker -t -j 2 -x run_tests/sanity_linux_dbg_native/sponge_log.xml --report_suite_name sanity_linux_dbg_native -l sanity -c dbg --iomgr_platform native --report_multi_target"
run_tests_clang-tidy_linux_dbg_native: "python3 tools/run_tests/run_tests.py --use_docker -t -j 2 -x run_tests/clang-tidy_linux_dbg_native/sponge_log.xml --report_suite_name clang-tidy_linux_dbg_native -l clang-tidy -c dbg --iomgr_platform native --report_multi_target"
run_tests_iwyu_linux_dbg_native: "python3 tools/run_tests/run_tests.py --use_docker -t -j 2 -x run_tests/iwyu_linux_dbg_native/sponge_log.xml --report_suite_name iwyu_linux_dbg_native -l iwyu -c dbg --iomgr_platform native --report_multi_target"
```
This PR should fix this (be removing the umbrella "sanity" label from
clang-tidy and iwyu)
(part of removing support for VS2017)
Also see https://github.com/grpc/grpc/pull/32649
Also see https://github.com/grpc/grpc/pull/32615
The switch to grpc-win2019 windows workers has already happened:
(cl/517400022).
Once this PR lands, I'll backport to 1.53.x branch as well (since that
release removes the VS2017 support).
* try speeding up linux portability test
* remove gcc8.3 portability test
* c-ares is the default resolver on linux
* dont set parallel run_tests jobs too high
* original parallelism might lead to better results
* Merge the 3 repeating Python binary compilations
* Restore grpcio_metadata.py
* run_tests.py is running on <3.6
* Restore the Windows gevent version pin
* support "move and respawn" for kokoro jobs
* delete_nonartifacts.sh no longer needed
* bazel distribtest dont publish any artifacts
* try the altsrc respawn for selected jobs
* use altsrc for all windows CI jobs
* use altsrc for all macos CI jobs
* only move files under src/github
* fix uploading artifacts on windows
* Add isort_code.sh to sanity tests
* Run tools/distrib/isort_code.sh
* Fine tune the import order for relative imports
* Make pylint and project generation happy
* Fix a few corner cases
* Use --check instead of --diff
* The import order impacts test result somehow
* Make isort print diff and check output at the same time
* Let tools/run_tests/python_utils be firstparty library
* Run isort against latest HEAD