Deprecate ExtendedAttributes, ExtendedAttributeKey, ExtendedAttributeType, ExtendedAttributesBuilder

[trask]

[Will wait to mark this ready for review until after #8061 since that will clean this up a bit]

Follow-up to #7973

[codecov]

Codecov Report

❌ Patch coverage is 92.45283% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.21%. Comparing base (6893380) to head (dbf4cc7).

Files with missing lines	Patch %	Lines
...emetry/sdk/logs/ExtendedSdkReadWriteLogRecord.java	60.00%	2 Missing ⚠️
...try/sdk/common/internal/ExtendedAttributesMap.java	50.00%	1 Missing ⚠️
.../sdk/logs/internal/ExtendedReadWriteLogRecord.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8060      +/-   ##
============================================
- Coverage     90.23%   90.21%   -0.02%     
+ Complexity     7602     7600       -2     
============================================
  Files           838      838              
  Lines         22806    22819      +13     
  Branches       2274     2274              
============================================
+ Hits          20578    20587       +9     
- Misses         1518     1520       +2     
- Partials        710      712       +2     

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