Add a rule like `no-unwrapped-debug-code` (name TBD) to disallow shipping test/dev-only code to production

It's pretty common in our app to accidentally do:
```
import { isTesting } from '@embroider/macros'; // or isDevelopingApp

if (isTesting()) { /* do something expensive */ }
```
which is [not stripped](https://github.com/embroider-build/embroider/tree/main/packages/macros#istesting-isdevelopingapp) in production builds like this would be:

```
import { isTesting, macroCondition } from '@embroider/macros'; // or isDevelopingApp

if (macroCondition(isTesting())) { /* do something expensive */ }
```

I propose we allow people to lint against this. An autofix would be even nicer.