Fix: ChannelMicroThreadAwaiter pooling bug

[timcassell]

PR Details

When >= 4096 awaiters are pooled, more awaiters are also added to the pool without being reset. This has the effect of possibly causing some await Script.NextFrame() points to continue immediately. This PR fixes that issue.

Related Issue

n/a

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My change requires a change to the documentation.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have built and run the editor to try this change out.

[Eideren]

Thanks !