test: Remove attachAllThreads from undocumented options list

[itaybre]

Description

Remove attachAllThreads from the undocumentedOptions set in SentryOptionsDocumentationSyncTests since the option is now documented in sentry-docs.

Motivation and Context

The attachAllThreads option (added in 9.9.0) was marked as undocumented with the comment "SDK not released yet". Now that 9.9.0 is released and the docs PR is up, this option should be validated by the sync test.

How did you test it?

The SentryOptionsDocumentationSyncTests will now validate that attachAllThreads is documented.

Checklist

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

#skip-changelog

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.430%. Comparing base (a47ad66) to head (5737941).
⚠️ Report is 23 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #7776       +/-   ##
=============================================
+ Coverage   85.401%   85.430%   +0.028%     
=============================================
  Files          487       487               
  Lines        29086     29513      +427     
  Branches     12602     12823      +221     
=============================================
+ Hits         24840     25213      +373     
- Misses        4196      4246       +50     
- Partials        50        54        +4     

see 19 files with indirect coverage changes

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[itaybre]

Waiting for getsentry/sentry-docs#17258

[itaybre]

Docs PR was merged, so we can merge this too now

[philprime]

LGTM