feat(rules): implement `flake8-bandit` `S201` (`flask_debug_true`) (#7503)
Part of #1646.
## Summary
Implement `S201`
([`flask_debug_true`](https://bandit.readthedocs.io/en/latest/plugins/b201_flask_debug_true.html))
rule from `bandit`.
I am fairly new to Rust and Ruff's codebase, so there might be better
ways to implement the rule or write the code.
## Test Plan
Snapshot test from
https://github.com/PyCQA/bandit/blob/1.7.5/examples/flask_debug.py, with
a few additions in the "unrelated" part to test a bit more cases.