This epic covers the work required to enhance the must-gather-operator to support the use of custom, user-provided must-gather images. Currently, users are limited to the default must-gather image, which cannot be easily extended for specialized diagnostics (e.g., for specific applications, third-party operators, or custom infrastructure).
This enhancement will introduce a secure, administrator-controlled mechanism to allowlist specific custom images and their required permissions, making the must-gather-operator more flexible for targeted debugging.

Acceptance Criteria:

1. User should be able to collect must-gather artifacts using custom images.
2. Admin should be able to provide list of custom images that are allowed to run.