Wire otlp common test suites into check

[thswlsqls]

Fixes #8736

Description

• exporters/otlp/common/build.gradle.kts registers the testIncubating JvmTestSuite but never wires it into check, so its 4 tests have not run in CI since Add experimental support for log extended attributes #7123 added the suite (2025-04-11).
• The sources still compile and pass checkstyle, so nothing looks broken.
• Adds the tasks { check { dependsOn(testing.suites) } } block that sdk/trace, sdk/logs, context and eight other modules already use.
• The skipped tests guard ExtendedAttributes issue with custom LogRecordData impl #7363: the log marshaler must accept a plain LogRecordData even when api-incubator is on the classpath.
• Follow-up to Wire api/incubator test suites into check #8691, which fixed the same gap in api/incubator and named this module as the remaining one.

Testing done

• Build wiring only: no production code, signature or public API change, so no test was added.
• ./gradlew :exporters:otlp:common:check --dry-run now lists :exporters:otlp:common:testIncubating; it was absent before.
• ./gradlew :exporters:otlp:common:check — BUILD SUCCESSFUL, 122 tests passed (118 existing plus the 4 from the newly wired suite, all green).
• docs/apidiffs/ is untouched.

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Pull request dashboard status

Merged · refreshed 2026-08-20 14:28 UTC

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.26%. Comparing base (0ae8f33) to head (8fb47e1).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8738      +/-   ##
============================================
- Coverage     91.27%   91.26%   -0.01%     
+ Complexity    10471    10470       -1     
============================================
  Files          1006     1006              
  Lines         28276    28276              
  Branches       3568     3568              
============================================
- Hits          25808    25807       -1     
  Misses         1675     1675              
- Partials        793      794       +1     

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