test: use commonFixtures for mcp cli tests

[dgozman]

No description provided.

[github-actions]

Test results for "tests 1"

2 failed
❌ [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

2 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1082 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node20`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:701 › should indicate current test status `@macos-latest-node20`

34190 passed, 668 skipped

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Merge workflow run.

[github-actions]

Test results for "MCP"

9 failed
❌ [webkit] › mcp/cli.spec.ts:426 › session › session-stop named session @mcp-windows-latest
❌ [chrome] › mcp/cli.spec.ts:433 › session › session-stop non-running session @mcp-macos-15
❌ [chromium] › mcp/cli.spec.ts:249 › mouse › mousewheel @mcp-macos-15
❌ [chromium] › mcp/cli.spec.ts:265 › save as › screenshot @mcp-macos-15
❌ [chromium] › mcp/cli.spec.ts:272 › save as › screenshot @mcp-macos-15
❌ [chromium] › mcp/cli.spec.ts:438 › session › session-stop-all @mcp-macos-15
❌ [chromium] › mcp/test-debug.spec.ts:167 › test_debug (pause/snapshot/resume) @mcp-macos-15
❌ [chromium] › mcp/test-debug.spec.ts:234 › test_debug / evaluate x 2 @mcp-macos-15
❌ [firefox] › mcp/cli.spec.ts:464 › session › session-delete named session @mcp-macos-15

3437 passed, 116 skipped

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Merge workflow run.