fix(test): stabilize flaky EventReplay inline onboarding test

[JoshuaKGoldberg]

The ReplayInlineOnboardingPanel component is loaded via React.lazy(), creating an async code-splitting boundary. Inside that lazy-loaded component, usePrompt calls useApiQuery (React Query), adding another async data-fetching boundary. The combination of these two async layers occasionally exceeded the findByText default timeout in CI, causing the test to flake.

This PR mocks the replayInlineOnboardingPanel module (a pattern already used for replayClipPreview) and asserts on a data-test-id instead of the rendered text.

Fixes REPLAY-879

Note that CI Jest tests are failing because the Frontend: Rerun Flaky Tests Known flaky tests should be run many times, just to be safe. label is causing other, still-flaky tests to be run. No longer applicable now that this is targeting master and #111860 is not yet merged.

Made with Cursor

[linear-code]

REPLAY-879 Flaky test: static/app/components/events/eventReplay/index.spec.tsx

[github-actions]

🚨 Warning: This pull request contains Frontend and Backend changes!

It's discouraged to make changes to Sentry's Frontend and Backend in a single pull request. The Frontend and Backend are not atomically deployed. If the changes are interdependent of each other, they must be separated into two pull requests and be made forward or backwards compatible, such that the Backend or Frontend can be safely deployed independently.

Have questions? Please ask in the #discuss-dev-infra channel.

[sentry]

🚧 Skipped: PR exceeds review size limit.

Please split into smaller PRs and re-run.
_{Reference ID: 12937490}