Chronos: Optimized UTs script

[liangs6212]

Description

Added some pytest.mark.NAME and used the -m parameter to select UTs

1. Why the change?

Listing all tests makes the script harder to maintain, so we can use pytest.mark.NAME to filter the UTs

2. User API changes

No changed.

3. Summary of the change

1.Decorate UTs with Pytest.mark.NAME 2.Test UTs with pytest -m "NAME1 and NAME2"

4. How to test?

• [ ] Unit test