[WIP] [3006.x] Increase code coverage for file module

[Ch3LL]

What issues does this PR fix or reference?

Part of https://github.com/saltstack/salt/issues/64734

[codecov[bot]]

Codecov Report

Merging #65387 (0791e04) into 3006.x (64280ee) will decrease coverage by 0.02%. Report is 27 commits behind head on 3006.x. The diff coverage is 99.00%.

@@            Coverage Diff             @@
##           3006.x   #65387      +/-   ##
==========================================
- Coverage   62.25%   62.23%   -0.02%     
==========================================
  Files        3218     3218              
  Lines      442339   442438      +99     
  Branches    84680    84687       +7     
==========================================
- Hits       275338   275295      -43     
- Misses     151416   151570     +154     
+ Partials    15585    15573      -12     

Flag	Coverage Δ
almalinux-8	58.80% <99.00%> (+0.02%)	:arrow_up:
almalinux-9	58.79% <99.00%> (+0.03%)	:arrow_up:
amazonlinux-2	58.78% <99.00%> (+0.02%)	:arrow_up:
archlinux-lts	58.70% <99.00%> (+0.03%)	:arrow_up:
centos-7	58.84% <99.00%> (+0.03%)	:arrow_up:
centosstream-8	58.82% <99.00%> (+0.04%)	:arrow_up:
centosstream-9	58.81% <99.00%> (+0.02%)	:arrow_up:
debian-10	58.00% <99.00%> (+0.02%)	:arrow_up:
debian-11	57.98% <99.00%> (+0.01%)	:arrow_up:
debian-11-arm64	57.97% <99.00%> (+0.03%)	:arrow_up:
debian-12	57.97% <99.00%> (+0.03%)	:arrow_up:
debian-12-arm64	57.97% <99.00%> (+0.02%)	:arrow_up:
fedora-37	58.78% <99.00%> (+0.03%)	:arrow_up:
fedora-38	58.72% <99.00%> (+0.03%)	:arrow_up:
opensuse-15	57.77% <99.00%> (+0.03%)	:arrow_up:
photonos-3	58.44% <99.00%> (+0.02%)	:arrow_up:
photonos-4	58.42% <99.00%> (+0.04%)	:arrow_up:
photonos-4-arm64	58.24% <99.00%> (+0.02%)	:arrow_up:
salt	46.36% <50.00%> (-0.03%)	:arrow_down:
tests	89.84% <100.00%> (-<0.01%)	:arrow_down:
ubuntu-20.04	58.00% <99.00%> (+0.02%)	:arrow_up:
ubuntu-20.04-arm64	58.01% <99.00%> (+0.03%)	:arrow_up:
ubuntu-22.04	58.00% <99.00%> (+0.02%)	:arrow_up:
ubuntu-22.04-arm64	58.00% <99.00%> (+0.03%)	:arrow_up:
windows-2016	?
windows-2019	53.10% <82.00%> (+0.01%)	:arrow_up:
windows-2022	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...ests/pytests/unit/modules/file/test_file_chattr.py	98.31% <100.00%> (+0.42%)	:arrow_up:
...ests/pytests/unit/modules/file/test_file_module.py	100.00% <100.00%> (ø)
salt/modules/file.py	64.06% <50.00%> (+2.04%)	:arrow_up:

... and 47 files with indirect coverage changes