feat(anta.tests): Added testcases for AVT feature

[MaheshGSLAB]

Description

Added the test cases for AVT features.

Fixes #615

Checklist:

• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my code
• [ ] I have run pre-commit for code linting and typing (pre-commit run)
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes (tox -e testenv)

[gmuloc]

@MaheshGSLAB can you move the faiing test with ping avt in another PR and we will merge the 3 others?