Increase suite-level e2e test timeout

[cte]

Description

Increased to 2m per suite, and 20m overall.

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Important

Increase e2e test suite timeout to 2 minutes per suite and 20 minutes overall, and centralize timeout configuration using setDefaultSuiteTimeout().

• Timeout Adjustments:
  • Increase suite-level timeout to 2 minutes and overall timeout to 20 minutes in index.ts.
  • Introduce setDefaultSuiteTimeout() in test-utils.ts to set default suite timeout to 120,000 ms.
• Test Suite Modifications:
  • Apply setDefaultSuiteTimeout() to test suites in extension.test.ts, modes.test.ts, and task.test.ts.
  • Remove individual test timeouts in apply-diff.test.ts, execute-command.test.ts, and 8 other test files.
• Miscellaneous:
  • Add test-utils.ts to centralize timeout configuration.

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