Switch version from function to string in otelhttptrace

[ElenaZvereva]

refactor(otelhttptrace): change Version() func to const Version string
Part of #8272

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: dmathieu / name: Damien Mathieu (e55f183)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.3%. Comparing base (324aed7) to head (e55f183).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #8302     +/-   ##
=======================================
- Coverage   82.3%   82.3%   -0.1%     
=======================================
  Files        183     182      -1     
  Lines      13766   13764      -2     
=======================================
- Hits       11331   11329      -2     
  Misses      2030    2030             
  Partials     405     405             

Files with missing lines	Coverage Δ
...on/net/http/httptrace/otelhttptrace/clienttrace.go	83.7% <100.0%> (ø)

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[flc1125]

Only this change.

[ElenaZvereva]

@dmathieu should I re-request review of the whole team after every change in PR? Or should I only wait for approval from the person who suggested the last change (in this case - @pellared)?

[dmathieu]

No need to rerequest review from everyone.

Requested changes have been applied.

[dmathieu]

The changes requested by @pellared were applied over 5 days ago, and this has 2 reviews. Merging.