Add troubleshooting scripts - Cluster storage tests

[aarnq]

Is your feature request related to a problem? Please describe.

Compliant Kubernetes needs more troubleshooting scripts to help operators quickly figure out faults in an environment.
We need checks for the status of the cluster storage so we can assert that it works as it should.

Describe the solution you'd like

I would imagine using a test Pod with a PVC.

CSI:

• Check can create Pod and PVC
• Check can move Pod and PVC
  • This should perhaps also be possible to test on an existing volume.
• Check can delete Pod and PVC

Possible addition:

• Some limited read/write test to check bandwidth and IOPS

Describe alternatives you've considered

Alternatives would be to check manually and ensure that the config is correct.

Additional context

Note that it could be good to have the option of doing these as targeted tests as well.

Definition of done:

List of tests implemented under a test command.