Upgrade opentelemetry-extension-kotlin to kotlin 2.2

[jack-berg]

w: API version 2.1 is deprecated and its support will be removed in a future version of Kotlin. Update the version to 2.2.

[opentelemetry-pr-dashboard]

Pull request dashboard status

Waiting on maintainers · refreshed 2026-09-12 03:11 UTC

Merge when ready.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.27%. Comparing base (77b1ac4) to head (1512c6a).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8804      +/-   ##
============================================
- Coverage     91.28%   91.27%   -0.02%     
+ Complexity    10528    10526       -2     
============================================
  Files          1008     1008              
  Lines         28465    28465              
  Branches       3617     3617              
============================================
- Hits          25984    25981       -3     
  Misses         1685     1685              
- Partials        796      799       +3     

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