[3.10] bpo-46633: Skip tests on ASAN and/or MSAN builds (GH-31632) (GH-31634)

[3.10] bpo-46633: Skip tests on ASAN and/or MSAN builds (GH-31632) (GH-31634)

* Refactor sanitiser skip tests into test.support (GH-30889)

* Refactor sanitizer skip tests into test.support

(cherry picked from commit b1cb8430504931f7854eac5d32cba74770078a4e)

* Add skips to crashing tests under sanitizers instead of manually skipping them (GH-30897)

(cherry picked from commit a27505345e34d462139f5f8b6b5e7c9a59955150)

* bpo-46633: Skip tests on ASAN and/or MSAN builds (GH-31632)

Skip tests on ASAN and/or MSAN builds:

* multiprocessing tests
* test___all__
* test_concurrent_futures
* test_decimal
* test_peg_generator
* test_tools

(cherry picked from commit 9204bb72a2da5885facc747e63d2bd2d654606fe)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>