Replace deprecated asyncio.iscoroutinefunction with its counterpart…

[layday]

… from inspect (#10634)

(cherry picked from commit 77ad7d7)

What do these changes do?

Replace asyncio.iscoroutinefunction with inspect.iscoroutinefunction

asyncio.iscoroutinefunction was deprecated in python/cpython#122875.

Are there changes in behavior for the user?

No.

Is it a substantial burden for the maintainers to support this?

No.

Related issue number

None.

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• If you provide code modification, please add yourself to CONTRIBUTORS.txt
  • The format is <Name> <Surname>.
  • Please keep alphabetical order, the file is sorted by names.
• Add a new news fragment into the CHANGES/ folder

  • name it <issue_or_pr_num>.<type>.rst (e.g. 588.bugfix.rst)

  • if you don't have an issue number, change it to the pull request
    number after creating the PR

    • .bugfix: A bug fix for something the maintainers deemed an
      improper undesired behavior that got corrected to match
      pre-agreed expectations.
    • .feature: A new behavior, public APIs. That sort of stuff.
    • .deprecation: A declaration of future API removals and breaking
      changes in behavior.
    • .breaking: When something public is removed in a breaking way.
      Could be deprecated in an earlier release.
    • .doc: Notable updates to the documentation structure or build
      process.
    • .packaging: Notes for downstreams about unobvious side effects
      and tooling. Changes in the test invocation considerations and
      runtime assumptions.
    • .contrib: Stuff that affects the contributor experience. e.g.
      Running tests, building the docs, setting up the development
      environment.
    • .misc: Changes that are hard to assign to any of the above
      categories.

  • Make sure to use full sentences with correct case and punctuation,
    for example:

    Fixed issue with non-ascii contents in doctest text files
    -- by :user:`contributor-gh-handle`.

    Use the past tense or the present tense a non-imperative mood,
    referring to what's changed compared to the last released version
    of this project.

[codspeed-hq]

CodSpeed Performance Report

Merging #10664 will not alter performance

_{Comparing layday:patchback/backports/3.12/77ad7d7ea173eda1306297d275b2d5f7348f9f60/pr-10634 (28d77b5) with 3.12 (710b64e)}

Summary

✅ 51 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.10%. Comparing base (710b64e) to head (28d77b5).
Report is 201 commits behind head on 3.12.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             3.12   #10664      +/-   ##
==========================================
+ Coverage   97.79%   98.10%   +0.30%     
==========================================
  Files         126      126              
  Lines       37600    37601       +1     
  Branches     2132     2132              
==========================================
+ Hits        36772    36887     +115     
+ Misses        649      545     -104     
+ Partials      179      169      -10     

Flag	Coverage Δ
CI-GHA	97.98% <100.00%> (+0.28%)	⬆️
OS-Linux	97.68% <100.00%> (+0.01%)	⬆️
OS-Windows	94.75% <85.71%> (?)
OS-macOS	96.81% <100.00%> (+<0.01%)	⬆️
Py-3.10.11	96.70% <100.00%> (+0.28%)	⬆️
Py-3.10.16	97.27% <100.00%> (+<0.01%)	⬆️
Py-3.11.11	97.33% <100.00%> (+0.62%)	⬆️
Py-3.11.9	96.81% <100.00%> (+0.28%)	⬆️
Py-3.12.9	97.77% <100.00%> (+1.15%)	⬆️
Py-3.13.2	97.76% <100.00%> (+0.29%)	⬆️
Py-3.9.13	96.58% <85.71%> (+0.28%)	⬆️
Py-3.9.21	97.14% <85.71%> (+0.68%)	⬆️
Py-pypy7.3.16	83.36% <71.42%> (?)
VM-macos	96.81% <100.00%> (+<0.01%)	⬆️
VM-ubuntu	97.68% <100.00%> (+0.01%)	⬆️
VM-windows	94.75% <85.71%> (?)

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