Reapply "Revert "test: make trace-viewer tests e2e (#39174)"

[Skn0tt]

relands, but without the bug reported in #39202.

[Skn0tt]

this is the change

[github-actions]

Test results for "tests 1"

6 failed
❌ [playwright-test] › reporter-html.spec.ts:1078 › created › should use file-browser friendly extensions for buffer attachments based on contentType @macos-latest-node20
❌ [playwright-test] › test-step.spec.ts:577 › should not mark page.close as failed when page.click fails @macos-latest-node20
❌ [playwright-test] › to-have-screenshot.spec.ts:98 › should not retry serial mode suites with missing expectation errors @macos-latest-node20
❌ [playwright-test] › ui-mode-test-network-tab.spec.ts:371 › should not preserve selection across test runs @macos-latest-node20
❌ [playwright-test] › update-aria-snapshot.spec.ts:669 › update-source-method › should overwrite source when specified in the config @macos-latest-node20
❌ [playwright-test] › update-aria-snapshot.spec.ts:345 › should update multiple files @windows-latest-node20

3 flaky

⚠️ [chromium-page] › page/page-request-continue.spec.ts:754 › propagate headers cross origin redirect after interception `@chromium-ubuntu-22.04-node20`
⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1082 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node20`
⚠️ [webkit-page] › page/page-set-input-files.spec.ts:38 › should upload a folder `@webkit-ubuntu-22.04-node20`

38550 passed, 843 skipped

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Merge workflow run.

[github-actions]

Test results for "MCP"

12 failed
❌ [chrome] › mcp/cli-session.spec.ts:152 › workspace isolation - sessions in different workspaces are isolated @mcp-windows-latest
❌ [chrome] › mcp/video.spec.ts:43 › should work with { saveVideo } (isolated) @mcp-macos-15
❌ [chromium] › mcp/cli-devtools.spec.ts:94 › video-start-stop @mcp-macos-15
❌ [chromium] › mcp/cli-save-as.spec.ts:19 › screenshot @mcp-macos-15
❌ [chromium] › mcp/cli-save-as.spec.ts:26 › screenshot @mcp-macos-15
❌ [chromium] › mcp/cli-save-as.spec.ts:41 › screenshot --filename @mcp-macos-15
❌ [chromium] › mcp/core.spec.ts:158 › browser_resize @mcp-macos-15
❌ [chromium] › mcp/launch.spec.ts:21 › test reopen browser @mcp-macos-15
❌ [chromium] › mcp/video.spec.ts:63 › should work with recordVideo (isolated) @mcp-macos-15
❌ [chromium] › mcp/video.spec.ts:23 › should work with --save-video (persistent) @mcp-macos-15
❌ [chromium] › mcp/video.spec.ts:43 › should work with { saveVideo } (persistent) @mcp-macos-15
❌ [chromium] › mcp/video.spec.ts:63 › should work with recordVideo (persistent) @mcp-macos-15

4754 passed, 135 skipped

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Merge workflow run.