feat: add --invoke-image to image fns

[seshubaws]

Which issue(s) does this change fix?

#8014

Why is this change necessary?

For Image functions, this flag is actually currently being ignored.

How does it address the issue?

Now, for image functions, you can point to different images to invoke locally.

What side effects does this change have?

Mandatory Checklist

PRs will only be reviewed after checklist is complete

• Review the generative AI contribution guidelines
• Add input/output type hints to new functions/methods
• Write design document if needed (Do I need to write a design document?)
• Write/update unit tests
• Write/update integration tests
• Write/update functional tests if needed
• make pr passes
• make update-reproducible-reqs if dependencies were changed
• Write documentation

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.