return resource in auto configured sdk

[zeitlinger]

Alternative to #7418 that

• does not expose resource more than it already is - as part of AutoConfiguredOpenTelemetrySdk
• does not create resource twice

Fixes open-telemetry/opentelemetry-java-instrumentation#14325

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.00%. Comparing base (2a92794) to head (5f388fb).
⚠️ Report is 17 commits behind head on main.

Files with missing lines	Patch %	Lines
...leconfig/AutoConfiguredOpenTelemetrySdkAccess.java	76.47%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #7639      +/-   ##
============================================
- Coverage     90.01%   90.00%   -0.01%     
- Complexity     7091     7100       +9     
============================================
  Files           803      804       +1     
  Lines         21443    21463      +20     
  Branches       2092     2093       +1     
============================================
+ Hits          19302    19318      +16     
- Misses         1477     1480       +3     
- Partials        664      665       +1     

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