Add tests for async map operation race conditions

### Describe the feature you'd like supported

There was a race condition found in #4647 in async map operations for the perf event array and ring buffer maps.

The problem is that there is no synchronization between the IOCTL handlers, async completion, and async cancellation.

The bug was fixed in #4790 , but we still need comprehensive tests to validate the fix to this race condition.

We should add tests to comprehensively hit the async completion/cancellation paths.

### Proposed solution

The race conditions are between async op completion/cancellation, so we should add test(s) where one thread thread repeatedly calls perf buffer new + free while events are being written to the buffer at high rate.

### Additional context

_No response_