[BUG] Fix writes for empty dataframes if target directory does not exist

[colin-ho]

Writes for empty dataframes currently error out if the target directory does not exist. This happens in the overwrite_files method when looking for files to delete, and also in write_empty_tabular when trying to write a file in a non-existent directory.

[codspeed-hq]

CodSpeed Performance Report

Merging #3278 will degrade performances by 15.73%

_{Comparing colin/fix-empty-overwrites (4a0f041) with main (5115c32)}

Summary

⚡ 1 improvements
❌ 2 regressions
✅ 14 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	colin/fix-empty-overwrites	Change
❌	test_count[1 Small File]	3.4 ms	3.9 ms	-12.43%
❌	test_iter_rows_first_row[100 Small Files]	260.7 ms	309.3 ms	-15.73%
⚡	test_show[100 Small Files]	42.4 ms	24 ms	+76.64%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.65%. Comparing base (1a4d259) to head (4a0f041).
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3278      +/-   ##
==========================================
+ Coverage   77.57%   77.65%   +0.08%     
==========================================
  Files         665      665              
  Lines       80900    80969      +69     
==========================================
+ Hits        62756    62880     +124     
+ Misses      18144    18089      -55     

Files with missing lines	Coverage Δ
daft/filesystem.py	71.11% <100.00%> (+0.48%)	⬆️
daft/table/table_io.py	88.88% <100.00%> (+0.13%)	⬆️

... and 18 files with indirect coverage changes

[kevinzwang]

LGTM