(4) ref(tracing): Extract UserInteractionTracing as standalone interaction

[krystofwoldrich]

📢 Type of change

• Refactoring

📜 Description

This PR moved User Interaction Tracing to a standalone integration.

To do so this PR refactors part of ReactNativeTracing. Introducing ReactNative specific startIdleSpan and startIdleNavigationSpan. These function are used in both ReactNativeTracing and User Interaction Tracing integrations.

Moving the tracking to a standalone integration will let us measure usage of this feature (enabled integrations telemetry).

This PR introduces user facing breaking change.

Before

import Sentry from '@sentry/react-native';
Sentry.init({
  tracesSampleRate: 1.0,
  integrations: [
    new Sentry.ReactNativeTracing({
      enableUserInteractionTracing: true, // default false
    }),
  ],
});

After

import Sentry from '@sentry/react-native';
Sentry.init({
  tracesSampleRate: 1.0,
  enableUserInteractionTracing: true, // default false
});

💚 How did you test it?

sample app, tests

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled
• All tests passing
• No breaking changes

Predecessor to this PR

• (3) ref(tracing): Extract Stall Tracking to a standalone integration #3997

[github-actions]

Android (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	425.46 ms	463.49 ms	38.03 ms
Size	17.73 MiB	20.04 MiB	2.31 MiB

[github-actions]

iOS (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1230.96 ms	1228.84 ms	-2.12 ms
Size	2.36 MiB	3.06 MiB	714.07 KiB

[github-actions]

iOS (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1240.29 ms	1238.71 ms	-1.58 ms
Size	2.92 MiB	3.62 MiB	719.93 KiB

[lucas-zimerman]

PR description says This PR introduces user facing breaking change. but on Checklist you marked No breaking changes?

[lucas-zimerman]

Small note on the PR description, but nothing blocking the PR, LGTM!

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- Extract UserInteractionTracing as standalone interaction ([#3999](https://github.com/getsentry/sentry-react-native/pull/3999))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

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