adding options to pod execution

[mshitrit]

adding options to pod execution:

• allowing execution of commands without expected output
• allowing using a user defined pod executing

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[clobrano]

I think the function description should be updated to clarify that only the 1st RunOptions is actually used (as the variadic argument is used to allow no RunOptions). Otherwise, you might think of defining two APIs, one with 1 RunOptions (user defined) and one without RunOptions, which internally calls the first passing the default RunOptions.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: clobrano, mshitrit

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[clobrano]

/lgtm
Giving a chance to get more reviews, feel free to unhold
/hold

[mshitrit]

/unhold