Add CSV based env var to define istio hosts

[josh-thisisbud]

Signed-off-by: Josh Harwood josh.harwood@thisisbud.com

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[josh-thisisbud]

Hey, so I'm having issues getting past this CLA step.

My Company has signed the CLA and I've been added to their Google Workspace group to become a authorized contributor however when I attempt to rescan I'm getting a 400 error submitting the rescan form?

[thesuperzapper]

@josh-thisisbud I believe this is a duplicate of #6902, please raise any comments there if that PR is not sufficient for your use-case.