Remove MustGather from test-frame

[kornys]

Description

Since configuration seems to be tricky and it requires more and more complexity there is no added value for end user of test-frame. Current implementation of using LogCollector ad-hoc or based on event configured by end-user is most productive and adds full power.
So from my POV it would be better to remove MustGather and leave config on end-user.

Type of Change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

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
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit/integration tests pass locally with my changes