chore: add prompt to confirm kube context target

[shreddedbacon]

Checklist

• Affected Issues have been mentioned in the Closing issues section
• Documentation has been written/updated
• PR title is ready for changelog and subsystem label(s) applied

When running make test-e2e locally without the kind/ or github/ prefix, there is the potential to target a kube context that may not be correct.

This adds a prompt confirming the context, with an override which is used when using the kind/ or github/ prefixes