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

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.16%. Comparing base (89c7973) to head (1079cdc).
⚠️ Report is 11 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #7639      +/-   ##
============================================
+ Coverage     90.13%   90.16%   +0.03%     
- Complexity     7192     7195       +3     
============================================
  Files           814      814              
  Lines         21713    21719       +6     
  Branches       2127     2125       -2     
============================================
+ Hits          19570    19583      +13     
+ Misses         1477     1471       -6     
+ Partials        666      665       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[jack-berg]

Just a couple of minor comments but I think this is a decent way to proceed.

[zeitlinger]

@jack-berg please check again

[robsunday]

Solution works perfectly and I can access resource attributes in my BeforeAgentListener implementations

[zeitlinger]

@jack-berg can this be merged?