Replace asyncio.iscoroutinefunction to inspect.iscoroutinefunction

[PredaaA]

Summary

Fixes warning DeprecationWarning
DeprecationWarning: 'asyncio.iscoroutinefunction' is deprecated and slated for removal in Python 3.16; use inspect.iscoroutinefunction() instead

asyncio.iscoroutinefunction is deprecated in favor of inspect.iscoroutinefunction since 3.13 and makes a DeprecationWarning since 3.14.

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)

[Jackenmen]

Potentially relevant note about difference in behavior on older Python versions:
python/cpython#122858 (comment)