9e0a514112 Add compile time checking for all cs_main runtime locking assertions (practicalswift)
Pull request description:
Add compile time checking for `cs_main` runtime locking assertions. This PR is a subset of #12665. The PR was broken up to make reviewing easier. The intention is that literally all `EXCLUSIVE_LOCKS_REQUIRED`/`LOCKS_EXCLUDED`:s added in this PR should follow either directly or indirectly from `AssertLockHeld(…)`/`AssertLockNotHeld(…)`:s already existing in the repo. Consider the case where function `A(…)` contains `AssertLockHeld(cs_foo)` (without first locking `cs_foo` in `A`), and that `B(…)` calls `A(…)` (without first locking `cs_main`): * It _directly_ follows that: `A(…)` should have an `EXCLUSIVE_LOCKS_REQUIRED(cs_foo)` annotation. * It _indirectly_ follows that: `B(…)` should have an `EXCLUSIVE_LOCKS_REQUIRED(cs_foo)` annotation.
Backport of Core PR13083