allow the connection test to use a custom/mirrored repo when there's …

[mpapproth-vw]

…no connection to the internet by default

Ticket

n/a

What are you trying to accomplish?

The current test-connection.yaml has a hardcoded image "busybox" for the wget test.
If you are on an isolated Kubernetes cluster, you should be able to load the busybox image from your local/mirrored registry.

Screenshots

n/a

What approach did you choose and why?

Replace the hard-coded image string with a constructed one from new entries in values.yaml

Merge checklist

• Added/updated tests
• Added/updated documentation in Lookbook (patterns, previews, etc)
• Tested major browsers (Chrome, Firefox, Edge, ...)

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Latest commit: 24dbc25

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