Enable errorprone's UnnecessarilyFullyQualified check

[trask]

Currently built on top of

• Replace Xlint deprecation check with custom errorprone check #8061

[codecov]

Codecov Report

❌ Patch coverage is 76.47059% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.20%. Comparing base (73d0833) to head (4bf8ca6).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
...ntelemetry/sdk/testing/logs/TestLogRecordData.java	0.00%	3 Missing ⚠️
...sting/logs/internal/TestExtendedLogRecordData.java	0.00%	3 Missing ⚠️
...entelemetry/sdk/logs/ExtendedSdkLogRecordData.java	0.00%	1 Missing ⚠️
...va/io/opentelemetry/sdk/logs/SdkLogRecordData.java	0.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (76.47%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8078      +/-   ##
============================================
+ Coverage     90.18%   90.20%   +0.01%     
- Complexity     7591     7594       +3     
============================================
  Files           841      841              
  Lines         22911    22895      -16     
  Branches       2288     2291       +3     
============================================
- Hits          20663    20653      -10     
+ Misses         1531     1524       -7     
- Partials        717      718       +1     

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