RUM-3134 fix: SR test on iOS 17+

[maxep]

How?

Observation: getting the view's controller using the next responder requires the view-controller to be in a UIWindow.

Therefor, the test is modified to create the view tree in a window.

Review checklist

• Feature or bugfix MUST have appropriate tests (unit, integration)
• Make sure each commit and the PR mention the Issue number or JIRA reference
• Add CHANGELOG entry for user facing changes

Custom CI job configuration (optional)

• Run unit tests for Core, RUM, Trace, Logs, CR and WVT
• Run unit tests for Session Replay
• Run integration tests
• Run smoke tests
• Run tests for tools/

[datadog-datadog-prod-us1]

Datadog Report

Branch report: maxep/RUM-3134/fix-sr-test
Commit report: f768267
Test service: dd-sdk-ios

✅ 0 Failed, 3006 Passed, 0 Skipped, 10m 38.28s Wall Time
🔻 Test Sessions change in coverage: 3 decreased, 8 increased, 3 no change

🔻 Code Coverage Decreases vs Default Branch (3)

• test DatadogRUMTests tvOS 80.85% (-0.18%) - Details
• test DatadogCoreTests iOS 73.42% (-0.08%) - Details
• test DatadogRUMTests iOS 80.64% (-0.05%) - Details