feat: PromptGuard takes a list of str (#9948)
Recently we made the decision that PromptGuard takes a list of strings
instead of a string.
@ggroode implemented the integration change.
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Co-authored-by: ggroode <ggroode@berkeley.edu>
Co-authored-by: ggroode <46691276+ggroode@users.noreply.github.com>
