chore(webkit): drop support of macOS < 14

[yury-s]

macOS 13 is EOLed last year and the oldest macOS on GHA is 14: https://github.com/actions/runner-images?tab=readme-ov-file#available-images

[github-actions]

Test results for "tests 1"

9 failed
❌ [playwright-test] › expect-configure.spec.ts:38 › should configure message @macos-latest-node20
❌ [playwright-test] › playwright.spec.ts:877 › page.pause() should disable test timeout @macos-latest-node20
❌ [playwright-test] › playwright.trace.spec.ts:137 › should not throw with trace: on-first-retry and two retries in the same worker @macos-latest-node20
❌ [playwright-test] › playwright.trace.spec.ts:345 › should retain traces for interrupted tests @macos-latest-node20
❌ [playwright-test] › reporter.spec.ts:251 › created › should not have internal error when steps are finished after timeout @macos-latest-node20
❌ [playwright-test] › reporter.spec.ts:251 › merged › should not have internal error when steps are finished after timeout @macos-latest-node20
❌ [playwright-test] › reporter-html.spec.ts:1037 › created › should have link for opening HTML attachments in new tab @macos-latest-node20
❌ [playwright-test] › update-aria-snapshot.spec.ts:592 › update-source-method › should overwrite source @macos-latest-node20
❌ [playwright-test] › watch.spec.ts:690 › should run CT on changed deps @macos-latest-node20

6 flaky

⚠️ [chromium-library] › library/inspector/cli-codegen-pick-locator.spec.ts:35 › should update locator highlight `@chromium-ubuntu-22.04-node24`
⚠️ [chromium-library] › library/page-close.spec.ts:162 › should not treat navigations as new popups `@chromium-ubuntu-22.04-node20`
⚠️ [webkit-page] › page/page-autowaiting-basic.spec.ts:79 › should await form-post on click `@webkit-ubuntu-22.04-node20`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:183 › should show snapshots for steps `@macos-latest-node20`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:426 › should work behind reverse proxy `@macos-latest-node20`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:458 › should filter actions tab on double-click `@windows-latest-node20`

34401 passed, 696 skipped

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Merge workflow run.

[github-actions]

Test results for "MCP"

5 failed
❌ [chrome] › mcp/video.spec.ts:43 › should work with { saveVideo } (persistent) @mcp-macos-15
❌ [chromium] › mcp/launch.spec.ts:21 › test reopen browser @mcp-macos-15
❌ [firefox] › mcp/launch.spec.ts:21 › test reopen browser @mcp-macos-15
❌ [firefox] › mcp/launch.spec.ts:80 › persistent context @mcp-macos-15
❌ [firefox] › mcp/launch.spec.ts:117 › isolated context @mcp-macos-15

2817 passed, 116 skipped

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Merge workflow run.