Deprecate logger::provider() and logger::instrumentation_scope()

[lalitb]

Changes

Deprecating these methods. The methods were meant to be used by appenders, and they can always keep hold to the provider handle to get this data. We can anyway have additive changes even after stable release, so safe to remove it for now. Thanks for noticing them @utpilla :)

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.5%. Comparing base (c9388e4) to head (bceded9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #2349     +/-   ##
=======================================
- Coverage   79.5%   79.5%   -0.1%     
=======================================
  Files        123     123             
  Lines      21371   21366      -5     
=======================================
- Hits       17006   17000      -6     
- Misses      4365    4366      +1     

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