feat: Add support for passing variables through execute-with-aws-mfa
feat: Add support for passing variables through execute-with-aws-mfa

This feature is rarely needed, except for in the case of some AWS 
environment variables. AWS_ROLE_ARN is one example, which we might want 
the final script to receive, but not the execute-with-aws-mfa script 
itself.

edahlseng/dotfiles,edahlseng/dotfiles,edahlseng/dotfiles