Removes fs-err dependency

[brooksprumo]

Problem

We're trying to remove the fs-err crate. For more information, please refer to #34838.

Now there are no more uses of fs-err, so the dependency can be fully removed.

Summary of Changes

Remove the dependency

Fixes: #34885

[codecov]

Codecov Report

Attention: 42 lines in your changes are missing coverage. Please review.

Comparison is base (8ff511e) 81.6% compared to head (b807b65) 81.6%.
Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #34911     +/-   ##
=========================================
- Coverage    81.6%    81.6%   -0.1%     
=========================================
  Files         827      827             
  Lines      223884   223846     -38     
=========================================
- Hits       182841   182743     -98     
- Misses      41043    41103     +60     

[t-nelson]

hell yeah!

[brooksprumo]

Now I need a v1.18 label to do the backport 😊

[mergify]

Backports to the beta branch are to be avoided unless absolutely necessary for fixing bugs, security issues, and perf regressions. Changes intended for backport should be structured such that a minimum effective diff can be committed separately from any refactoring, plumbing, cleanup, etc that are not strictly necessary to achieve the goal. Any of the latter should go only into master and ride the normal stabilization schedule. Exceptions include CI/metrics changes, CLI improvements and documentation updates on a case by case basis.