impr: Send Cocoa SDK features

[philipphofmann]

📜 Description

Send enabled Cocoa SDK features with the event payload so that we can track their adoption in Looker.

💡 Motivation and Context

See getsentry/team-sdks#83.

💚 How did you test it?

Unit tests and sending an event via a simulator.

📝 Checklist

You have to check all boxes before merging:

• I reviewed the submitted code.
• 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.
• 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.

🔮 Next steps

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.795%. Comparing base (7bdf989) to head (4c15f4b).

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #3948       +/-   ##
=============================================
- Coverage   90.806%   90.795%   -0.011%     
=============================================
  Files          588       590        +2     
  Lines        45879     45945       +66     
  Branches     16370     16378        +8     
=============================================
+ Hits         41661     41716       +55     
+ Misses        4148      4049       -99     
- Partials        70       180      +110     

Files	Coverage Δ
Sources/Sentry/SentryClient.m	95.971% <100.000%> (+0.028%)	⬆️
...es/Swift/Helper/SentryEnabledFeaturesBuilder.swift	100.000% <100.000%> (ø)
...sts/Helper/SentryEnabledFeaturesBuilderTests.swift	100.000% <100.000%> (ø)
Tests/SentryTests/SentryClientTests.swift	97.354% <100.000%> (+0.014%)	⬆️

... and 29 files with indirect coverage changes

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