Enable WITH_OTLP_RETRY_PREVIEW by default

[marcalff]

Fixes #3481

Changes

Please provide a brief description of the changes here.

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

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.13%. Comparing base (813089c) to head (462e006).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3953   +/-   ##
=======================================
  Coverage   90.13%   90.13%           
=======================================
  Files         230      230           
  Lines        7293     7293           
=======================================
  Hits         6573     6573           
  Misses        720      720           

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