fix: Defer path expansion until collect in file scan methods

[stinodego]

Ref #17444

I left a TODO for delaying path expansion for scan_csv when with_column_names is specified. This will still raise immediately rather than on collect, but it's an annoying one to fix... Can look at it in a follow-up PR.

[codecov]

Codecov Report

Attention: Patch coverage is 94.33962% with 3 lines in your changes missing coverage. Please review.

Project coverage is 80.43%. Comparing base (aa2c8f1) to head (1705985).

Files	Patch %	Lines
crates/polars-lazy/src/scan/file_list_reader.rs	0.00%	2 Missing ⚠️
crates/polars-lazy/src/scan/ndjson.rs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #17532      +/-   ##
==========================================
- Coverage   80.44%   80.43%   -0.01%     
==========================================
  Files        1484     1484              
  Lines      195324   195341      +17     
  Branches     2778     2778              
==========================================
- Hits       157133   157128       -5     
- Misses      37679    37701      +22     
  Partials      512      512              

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[ritchie46]

Looks good. Can you do a rebase?