[runtime] Fix missing abort during abort protected regions

[runtime] Fix missing abort during abort protected regions

When aborting a thread we set the thread's interruption request and we also increment the global interruption request. If we were trying to abort a thread when it is in an abort protected region, it will just set an interruption deferred and not do anything else (in async_abort_critical). When the thread exited the abort protected region, it was missing the abort request since we didn't increment the global interruption request.

Refactor thread_interruption_requested modifications, making sure we always bump it when requesting an interruption and decrease it when we clear an interruption.