prowjob: remove outdated job config for kubevirt versions 0.3x.xx

[dhiller]

Is your feature request related to a problem? Please describe:
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There's a job config 3 that is outdated (it is configured to work on 0.34 and 0.36 branches only 2) and hasn't been run in tree years 1

Describe the solution you'd like:
we should remove it

Describe alternatives you've considered:
A clear and concise description of any alternative solutions or features you've considered.

Additional context:
Add any other context or screenshots about the feature request here.

[dhiller]

/kind cleanup
/good-first-issue

[kubevirt-bot]

@dhiller:
This request has been marked as suitable for new contributors.

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• Clear Task
• Solution Explained
• Provides Context
• Identifies Relevant Code
• Gives Examples
• Ready to Test
• Goldilocks priority
• Up-To-Date

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In response to this:

/kind cleanup
/good-first-issue

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