feat(extend): custom asymmetric matchers (before expect.extend immutable)

[muhqu]

#32562

[github-actions]

Test results for "tests 1"

5 failed
❌ [playwright-test] › expect.spec.ts:920:5 › should support mergeExpects
❌ [playwright-test] › expect.spec.ts:920:5 › should support mergeExpects
❌ [playwright-test] › expect.spec.ts:920:5 › should support mergeExpects
❌ [playwright-test] › expect.spec.ts:920:5 › should support mergeExpects
❌ [playwright-test] › expect.spec.ts:920:5 › should support mergeExpects

3 flaky

⚠️ [firefox-page] › page/frame-goto.spec.ts:46:3 › should continue after client redirect
⚠️ [chromium] › components/splitView.spec.tsx:35:5 › should render sidebar first
⚠️ [webkit-library] › library/download.spec.ts:698:3 › should convert navigation to a resource with unsupported mime type into download

35681 passed, 672 skipped
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Merge workflow run.