Deprecate peerServiceMapping

[trask]

Follow-up to

• Remove .instrumentation/development.general.peer.service_mapping opentelemetry-configuration#526

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.21%. Comparing base (c45930b) to head (8a148f5).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #8088   +/-   ##
=========================================
  Coverage     90.21%   90.21%           
  Complexity     7605     7605           
=========================================
  Files           841      841           
  Lines         22923    22923           
  Branches       2291     2291           
=========================================
  Hits          20681    20681           
  Misses         1525     1525           
  Partials        717      717           

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