remove test results mount from stork integration test container

[Rohit-PX]

What type of PR is this?
integration-test

What this PR does / why we need it:

• Stork integration tests on OCP are failing when running stork-integration test pod as the test tries to create the testresults directory but
  does not have adequate permissions
• The solution is to run the test pod with privileged security context
• But since we don't use the testresults directory any more (jenkins is now configured to not store that artifact) we can remove this from the stork-integration test pod spec and still make it work for OCP
• This way we can also avoid having to run the stork-integration test pod with privileged mode

Does this PR change a user-facing CRD or CLI?:
no

Is a release note needed?:
no

Does this change need to be cherry-picked to a release branch?:
no

[cnbu-jenkins]

Can one of the admins verify this patch?

[diptiranjanpx]

Can we mount the /testresults directory in the spec so that the directory is already available and no need to create it ? it can be an alternative. If at all we are not using the result, then it looks fine to remove.