* main:  Minor edits to the Descriptor HowTo Guide (pythonGH-24901)  Fix link to Lifecycle of a Pull Request in CONTRIBUTING (python#98102)pythonGH-94597: deprecate `SafeChildWatcher`, `FastChildWatcher` and `MultiLoopChildWatcher` child watchers  (python#98089)  Auto-cancel old builds when new commit pushed to branch (python#98009)pythongh-95011: Migrate syslog module to Argument Clinic (pythonGH-95012)

* main: (5519 commits)  Minor edits to the Descriptor HowTo Guide (pythonGH-24901)  Fix link to Lifecycle of a Pull Request in CONTRIBUTING (python#98102)pythonGH-94597: deprecate `SafeChildWatcher`, `FastChildWatcher` and `MultiLoopChildWatcher` child watchers  (python#98089)  Auto-cancel old builds when new commit pushed to branch (python#98009)pythongh-95011: Migrate syslog module to Argument Clinic (pythonGH-95012)pythongh-68686: Retire eptag ptag scripts (python#98064)pythongh-97922: Run the GC only on eval breaker (python#97920)  GitHub Workflows security hardening (python#96492)  Add `@ezio-melotti` as codeowner for `.github/`. (python#98079)pythongh-97913 Docs: Add walrus operator to the index (python#97921)  [doc] Fix broken links to C extensions accelerating stdlib modules (python#96914)pythongh-97822: Fix http.server documentation reference to test() function (python#98027)pythongh-91052: Add PyDict_Unwatch for unwatching a dictionary (python#98055)pythonGH-98023: Change default child watcher to PidfdChildWatcher on supported systems (python#98024)pythonGH-94182: Run the PidfdChildWatcher on the running loop (python#94184)pythongh-92886: make test_ast pass with -O (assertions off) (pythonGH-98058)pythongh-92886: make test_coroutines pass with -O (assertions off) (pythonGH-98060)pythongh-57179: Add note on symlinks for os.walk (python#94799)pythongh-94808: Fix regex on exotic platforms (python#98036)pythongh-90085: Remove vestigial -t and -c timeit options (python#94941)  ...

…`MultiLoopChildWatcher` child watchers (python#98089)