chore: extract unroute behavior tests into a separate file

[yury-s]

Reference #23781

[github-actions]

Test results for "tests 1"

4 failed
❌ [chromium] › library/inspector/cli-codegen-csharp.spec.ts:30:5 › should print the correct imports and context options
❌ [chromium] › library/inspector/cli-codegen-csharp.spec.ts:45:5 › should print the correct context options for custom settings
❌ [chromium] › library/inspector/cli-codegen-csharp.spec.ts:87:5 › should print the correct context options when using a device
❌ [chromium] › library/inspector/cli-codegen-csharp.spec.ts:146:5 › should print load/save storageState

2 flaky

⚠️ [chromium] › library/tracing.spec.ts:243:5 › should not include trace resources from the previous chunks
⚠️ [firefox] › page/frame-goto.spec.ts:46:3 › should continue after client redirect

21187 passed, 569 skipped
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Merge workflow run.