AthenaServices: enable thread-checker for entire package

Previously only selected services were enabled for thread-checking. To avoid that new code goes unchecked, revert the logic and check the entire package. Add thread-checker annotations where needed, i.e.:

• Disable thread-checker for:
  • AthenaEventLoopMgr
  • MixingEventSelector
  • PyAthenaEventLoopMgr
  • some of the testing code
  • and mark PageAccessControlSvc constructor as non-thread-safe.
• AthenaMtesEventLoopMgr: Explicitly pass the socket name (empty string as default like before) to the relevant yampl functions to avoid warnings about the external static "DEFAULT_ID".
• CoreDumpSvc: Add thread-checker annotations where needed. CoreDumpSvc is of course mostly not-thread-safe (and does not need to be).