Switch version from function to string in runtime

[jongwooo]

Change Version() func to const Version string in runtime

Part of #8272

[dmathieu]

This needs a changelog entry.

[jongwooo]

@dmathieu Thank you! I will also write changelogs for the other pull requests.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.3%. Comparing base (e47aa57) to head (718c7ab).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #8359     +/-   ##
=======================================
- Coverage   82.3%   82.3%   -0.1%     
=======================================
  Files        192     191      -1     
  Lines      13777   13775      -2     
=======================================
- Hits       11342   11340      -2     
  Misses      2030    2030             
  Partials     405     405             

Files with missing lines	Coverage Δ
instrumentation/runtime/producer.go	86.2% <100.0%> (ø)
instrumentation/runtime/runtime.go	73.3% <100.0%> (ø)

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[jongwooo]

Hi team, it looks like this issue has already been addressed in #8349. I suggest closing this PR to avoid duplication.