fix(kubernetes): removed env vars from tests

[PelegLi]

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Description

manually setting env vars in some tests might have caused inconsistency when running some tests concurrently in jenkins. removing this logic from the tests

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[gruebel]

☕