test: Only run flaky test detection for chromium (#15264)

This streamlines this a bit and should be good enough here.

Author: mydea

.github/workflows/flaky-test-detector.yml

@@ -51,6 +51,8 @@ jobs:
 
       - name: Install Playwright
         uses: ./.github/actions/install-playwright
+        with:
+          browsers: 'chromium'
 
       - name: Determine changed tests
         uses: dorny/[email protected]

dev-packages/browser-integration-tests/scripts/detectFlakyTests.ts

@@ -46,7 +46,9 @@ ${changedPaths.join('\n')}
   try {
     await new Promise<void>((resolve, reject) => {
       const cp = childProcess.spawn(
-        `npx playwright test ${testPaths.length ? testPaths.join(' ') : './suites'} --repeat-each ${repeatEachCount}`,
+        `npx playwright test ${
+          testPaths.length ? testPaths.join(' ') : './suites'
+        } --repeat-each ${repeatEachCount} --project=chromium`,
         { shell: true, cwd, stdio: 'inherit' },
       );