Fix missing delete directory functionality

[nellh]

This component was implemented but failed to render in the appropriate context. Instead the bulk delete component was rendered multiple times instead of at the top level only.

This PR also fixes the cache logic so file deletion is handled client side correctly and removes some unused duplicate components left over from the redesign.

Fixes #2776

[codecov]

Codecov Report

Merging #2778 (a0ae32d) into master (cbdf208) will decrease coverage by 0.18%.
The diff coverage is 30.00%.

@@            Coverage Diff             @@
##           master    #2778      +/-   ##
==========================================
- Coverage   76.05%   75.88%   -0.18%     
==========================================
  Files         412      411       -1     
  Lines       67125    67157      +32     
  Branches     2046     2041       -5     
==========================================
- Hits        51052    50959      -93     
- Misses      16022    16147     +125     
  Partials       51       51              

Impacted Files	Coverage Δ
...nneuro-app/src/scripts/dataset/files/file-tree.tsx	75.15% <20.00%> (-0.95%)	⬇️
...-app/src/scripts/dataset/mutations/delete-file.jsx	41.07% <29.78%> (-15.34%)	⬇️
...s/openneuro-app/src/scripts/dataset/files/file.tsx	69.52% <100.00%> (ø)
...penneuro-components/src/warn-button/WarnButton.tsx	18.94% <0.00%> (-76.85%)	⬇️
services/datalad/datalad_service/common/s3.py	83.78% <0.00%> (-2.71%)	⬇️

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