vfs: invalidate entry cache in readdir

[SandyXSD]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 92.18750% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 55.43%. Comparing base (96bebe7) to head (4d1ba44).

Files	Patch %	Lines
pkg/vfs/vfs.go	91.17%	2 Missing and 1 partial ⚠️
pkg/fuse/fuse.go	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4453      +/-   ##
==========================================
+ Coverage   55.32%   55.43%   +0.10%     
==========================================
  Files         157      157              
  Lines       41112    41173      +61     
==========================================
+ Hits        22746    22823      +77     
+ Misses      15837    15822      -15     
+ Partials     2529     2528       -1     

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