fix(locators): do not escape regular expressions with u or v flag

[dgozman]

Fixes #27163.

[github-actions]

Test results for "tests 1"

1 failed
❌ [playwright-test] › playwright.spec.ts:493:5 › should work with video: on-first-retry

10 flaky

⚠️ [chromium] › library/tracing.spec.ts:239:5 › should not include trace resources from the previous chunks
⚠️ [chromium] › page/page-event-request.spec.ts:130:3 › should report navigation requests and responses handled by service worker with routing
⚠️ [chromium] › library/tracing.spec.ts:239:5 › should not include trace resources from the previous chunks
⚠️ [chromium] › library/tracing.spec.ts:239:5 › should not include trace resources from the previous chunks
⚠️ [firefox] › page/page-event-request.spec.ts:162:3 › should return response body when Cross-Origin-Opener-Policy is set
⚠️ [chromium] › page/page-event-request.spec.ts:130:3 › should report navigation requests and responses handled by service worker with routing
⚠️ [webkit] › library/browsercontext-reuse.spec.ts:50:1 › should reset serviceworker
⚠️ [webkit] › page/page-goto.spec.ts:266:3 › should fail when navigating to bad SSL
⚠️ [webkit] › page/page-goto.spec.ts:277:3 › should fail when navigating to bad SSL after redirects
⚠️ [playwright-test] › ui-mode-test-progress.spec.ts:167:5 › should update tracing network live

25654 passed, 604 skipped
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Merge workflow run.