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Switch default OTel sampler to TraceIdRatioBased

Placeholder Georg Friedrich requested to merge github/fork/GFriedrich/12443-switch-default-sampler into main

What this PR does / why we need it:

  • switches the default OTel sampler from AlwaysOn to TraceIdRatioBased, which is a more sane default in regards to load
  • fixes various documentation inconsitencies

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • CVE Report (Scanner found CVE and adding report)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Documentation

Which issue/s this PR fixes

fixes #12443 fixes #12432

How Has This Been Tested?

Checked that the default generated config files contains the expected configuration.

Checklist:

  • My change requires a change to the documentation.
  • I have updated the documentation accordingly.
  • I've read the CONTRIBUTION guide
  • I have added unit and/or e2e tests to cover my changes.
  • All new and existing tests passed.

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