POTEL 39 - Use RECORD_ONLY sampling decision if performance is disabled

[adinauer]

:scroll: Description

Also fixes a bug where isTraceSampling was used instead of isTracingEnabled.

:bulb: Motivation and Context

:green_heart: How did you test it?

:pencil: Checklist

• [ ] 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.

:crystal_ball: Next steps

[github-actions[bot]]

	Messages
:book:	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by :no_entry_sign: dangerJS against 7ebd37cc09ee139ed82039bfd3bb91ac5ddd7b13

[github-actions[bot]]

Performance metrics :rocket:

	Plain	With Sentry	Diff
Startup time	470.98 ms	537.14 ms	66.16 ms
Size	1.70 MiB	2.29 MiB	599.45 KiB

Previous results on branch: feat/potel-39-record-only-if-performance-disabled

Startup times

Revision	Plain	With Sentry	Diff
e74261b3780ae5b7a618b7f0044af299fed859d3	409.25 ms	427.44 ms	18.19 ms

App size

Revision	Plain	With Sentry	Diff
e74261b3780ae5b7a618b7f0044af299fed859d3	1.70 MiB	2.29 MiB	599.45 KiB