test(browser): Allow profile frames without abs_path for clearTimeout

Adds `clearTimeout` to the list of built-in browser functions that may
appear in JSSelfProfiler-sampled frames without `abs_path`/`lineno`/
`colno`, alongside `fetch` and `setTimeout`. The chunk-timer cleanup
inside the profiler's stop path can sample a `clearTimeout` frame that
trips `validateProfile`'s assertion.

Fixes #20957

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: mydea

dev-packages/browser-integration-tests/suites/profiling/test-utils.ts

@@ -99,8 +99,8 @@ export function validateProfile(
     expect(frame).toHaveProperty('function');
     expect(typeof frame.function).toBe('string');
 
-    // Some browser functions (fetch, setTimeout) may not have file locations
-    if (frame.function !== 'fetch' && frame.function !== 'setTimeout') {
+    // Some browser functions (fetch, setTimeout, clearTimeout) may not have file locations
+    if (frame.function !== 'fetch' && frame.function !== 'setTimeout' && frame.function !== 'clearTimeout') {
       expect(frame).toHaveProperty('abs_path');
       expect(frame).toHaveProperty('lineno');
       expect(frame).toHaveProperty('colno');