Bump OpenTelemetry to 1.8.0

[Kielek]

Fixes #.

Changes

Please provide a brief description of the changes here.

For significant contributions please make sure you have completed the following items:

• Appropriate CHANGELOG.md updated for non-trivial changes
• Design discussion issue #
• Changes in public API reviewed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.84%. Comparing base (71655ce) to head (349b6ec).
Report is 177 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1635      +/-   ##
==========================================
- Coverage   73.91%   73.84%   -0.08%     
==========================================
  Files         267      263       -4     
  Lines        9615     9807     +192     
==========================================
+ Hits         7107     7242     +135     
- Misses       2508     2565      +57     

Flag	Coverage Δ
unittests-Exporter.Geneva	60.01% <ø> (?)
unittests-Exporter.OneCollector	89.72% <ø> (?)
unittests-Extensions	82.75% <ø> (?)
unittests-Instrumentation.AspNet	77.27% <ø> (?)
unittests-Instrumentation.EventCounters	75.92% <ø> (?)
unittests-Instrumentation.Owin	85.61% <ø> (?)
unittests-Instrumentation.Process	100.00% <ø> (?)
unittests-Instrumentation.Runtime	100.00% <ø> (?)
unittests-Instrumentation.StackExchangeRedis	70.89% <ø> (?)
unittests-Instrumentation.Wcf	78.44% <ø> (?)
unittests-PersistentStorage	65.78% <ø> (?)
unittests-ResourceDetectors.Azure	81.53% <ø> (?)
unittests-ResourceDetectors.Host	40.00% <ø> (?)
unittests-ResourceDetectors.Process	100.00% <ø> (?)
unittests-ResourceDetectors.ProcessRuntime	76.08% <ø> (?)
unittests-Solution	79.43% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

see 205 files with indirect coverage changes

[CodeBlanch]

LGTM