Switch version from function to string in host

[jongwooo]

Change Version() func to const Version string in host

Part of #8272

[dmathieu]

This needs a changelog entry.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.3%. Comparing base (c303460) to head (62d9e33).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #8358     +/-   ##
=======================================
- Coverage   82.3%   82.3%   -0.1%     
=======================================
  Files        188     187      -1     
  Lines      13769   13767      -2     
=======================================
- Hits       11334   11332      -2     
  Misses      2030    2030             
  Partials     405     405             

Files with missing lines	Coverage Δ
instrumentation/host/host.go	78.5% <100.0%> (ø)

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