Codemod: deprecation mongo-client-bad-auth Semgrep

[clavedeluna]

https://semgrep.dev/playground/r/python.pymongo.security.mongodb.mongo-client-bad-auth?editorMode=advanced

this should be a pretty straight-forward fix transformer

[clavedeluna]

This could break applications if users aren't configured to auth with SCRAM-SHA-256" or similar.