mm/damon: misc improvements in tests and documents

Add various improvements to DAMON tests and documents.

Patch 1 and 2 from Zenghui Yu (Huawei) let DAMON selftest to clean up its state and output after running the tests. Patch 3 from Eva Kurchatova makes a few selftest be able to run with Python's safe path mode. Patch 4 from Kunwu Chan improves coverage of DAMON kunit tests. Finally, patches 5 and 6 from Liew Rui Yan clarify and fix typos on documents for DAMOS quota behaviors.

Below are notes that can be removed in the final commit message.

This is a batched repost of DAMON patches that were individually posted. Please refer to each patch for changelog.

Eva Kurchatova (1):
selftests/damon: add script dir to sys.path for PYTHONSAFEPATH
compatibility

Kunwu Chan (1):
mm/damon/tests/core-kunit: improve nr_samples_per_aggr test isolation

Liew Rui Yan (2):
Docs/mm/damon/design: clarify when qt_exceeds increases Docs/mm/damon/design: fix typos in temporal auto-tuning algorithm
section

Zenghui Yu (Huawei) (2):
selftests/damon: stop kdamond on error exits of no-op commit test selftests/damon: ignore test-generated damon_dump_output

 Documentation/mm/damon/design.rst             |  8 +++--
 mm/damon/tests/core-kunit.h                   | 19 +++++++---
 tools/testing/selftests/damon/.gitignore      |  1 +
 .../selftests/damon/damon_nr_regions.py       |  3 ++
 .../selftests/damon/damos_apply_interval.py   |  3 ++
 tools/testing/selftests/damon/damos_quota.py  |  3 ++
 .../selftests/damon/damos_quota_goal.py       |  3 ++
 .../selftests/damon/damos_tried_regions.py    |  3 ++
 .../damon/sysfs_no_op_commit_break.py         | 35 ++++++++++---------
 ...sysfs_update_schemes_tried_regions_hang.py |  3 ++
 ...te_schemes_tried_regions_wss_estimation.py |  3 ++
 11 files changed, 60 insertions(+), 24 deletions(-)

base-commit: d1153a22117b5c6171bdf24d32b7f6c314887d23

2.47.3