feat: use blazediff instead of pixelmatch

[teimurjan]

Description

Replaces pixelmatch third-party with a ~20-25% faster alternative BlazeDiff. It's type-safe and uses an enhanced algorithm inspired by pixelmatch. The API and results are identical.

Check Run Benchmark step.

Benchmarks

I have created a patched playwright-core package with @blazediff/core instead of pixelmatch.

Then, I created two repositories for benchmarking:

1. Using the original Playwright: https://github.com/teimurjan/playwright-benchmark.
2. Using the patched Playwright: https://github.com/teimurjan/playwright-blazediff-benchmark.

The benchmarks track time spent on toHaveScreenshot with 3 warmup iterations and 25 actual iterations.

Results:

• Before (pixelmatch): 2059.12ms, 1522.12ms, 1941.32ms average times
  • Check Run Playwright tests step.
• After (BlazeDiff): 1987.28ms, 1476.44ms, 1893.28ms average times
  • Check Run Playwright tests step.
• Improvement: ~4% faster in real Playwright usage scenarios.

Closes #37267.

[teimurjan]

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[github-actions]

Test results for "tests 1"

7 failed
❌ [playwright-test] › runner.spec.ts:118 › should ignore subprocess creation error because of SIGINT @macos-latest-node18-1
❌ [playwright-test] › to-have-screenshot.spec.ts:1174 › should attach expected/actual/diff when sizes are different @macos-latest-node18-1
❌ [playwright-test] › to-have-screenshot.spec.ts:1174 › should attach expected/actual/diff when sizes are different @ubuntu-latest-node18-1
❌ [playwright-test] › to-have-screenshot.spec.ts:1174 › should attach expected/actual/diff when sizes are different @ubuntu-latest-node20-1
❌ [playwright-test] › to-have-screenshot.spec.ts:1174 › should attach expected/actual/diff when sizes are different @ubuntu-latest-node22-1
❌ [playwright-test] › to-have-screenshot.spec.ts:1174 › should attach expected/actual/diff when sizes are different @ubuntu-latest-node24-1
❌ [playwright-test] › to-have-screenshot.spec.ts:1174 › should attach expected/actual/diff when sizes are different @windows-latest-node18-1

2 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1079 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node18`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:397 › should work behind reverse proxy `@macos-latest-node18-1`

46724 passed, 817 skipped

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Merge workflow run.

[mxschmitt]

I don't think we are comfortable migrating to an alternative package with 600 downloads/week. The actual one is still maintained and we haven't received a bug report about size/performance.

Closing as per above.