Emit warning for LazyFrame column membership

[VedantMadane]

Summary

• emit a PerformanceWarning when checking column membership on LazyFrame (schema resolution)
• add a unit test ensuring "foo" in lf triggers the warning

Testing

• python -m pytest py-polars/tests/unit/lazyframe/test_lazyframe.py -k properties

[VedantMadane]

Hi @pola-rs, I've updated this PR. Could you please take a look when you have a moment? Thank you!

[nameexhaustion]

Thanks for the PR, but will close as we have this fixed by #26734