Resolve Test workflow dependency conflict in requirements-test

[Copilot]

The GitHub Actions Test job failed before test execution due to a pip resolver conflict in requirements-test.txt. The file pinned pytest-asyncio>=1.4.0 while pytest-homeassistant-custom-component==0.13.340 required pytest-asyncio==1.3.0.

• Dependency resolution fix

  • Removed the direct pytest-asyncio requirement from requirements-test.txt.
  • Kept pytest-homeassistant-custom-component and pytest-cov unchanged.
  • This lets the Home Assistant test harness package control the compatible pytest-asyncio version.

• Scope

  • Single-file, minimal change in test dependency declarations.
  • No production integration code changes.

# requirements-test.txt
pytest-homeassistant-custom-component>=0.13.340
pytest-cov>=7.1.0