COCOA-8 Fix flaky `test_applicationWithScenes`

Note: 8.53.2 is the last release before SentrySDK was converted to Swift in 8.54.0, which requires more work and is best addressed separately.

• feat(SPM) Convert SentrySDK to Swift sentry-cocoa#5683

1. First, iOS device tests + retry failed in the CI:

   info: Starting test run for io.sentry.dotnet.maui.device.testapp..
   info: Application finished the test run successfully with some failed tests
   info: Tests run: 2208 Passed: 2176 Inconclusive: 0 Failed: 1 Ignored: 31
   

   https://github.com/getsentry/sentry-dotnet/actions/runs/17323472305/job/49181841490?pr=4483

2. I couldn't reproduce the failure locally, so I tried enabling verbose debug output for xharness to be able to see what goes wrong in the CI, but then the tests passed:

   info: Starting test run for io.sentry.dotnet.maui.device.testapp..
   dbug: [...]
   info: Application finished the test run successfully
   info: Tests run: 2208 Passed: 2177 Inconclusive: 0 Failed: 0 Ignored: 31
   

   https://github.com/getsentry/sentry-dotnet/actions/runs/17326219583/job/49190894046?pr=4483

3. After reverting verbose debug output, the device tests still pass:
   https://github.com/getsentry/sentry-dotnet/actions/runs/17326894824/job/49193157045?pr=4483

Looks like the failure was not related to the Cocoa SDK upgrade, after all.