REF: multi_take is now able to tackle all list-like (non-bool) cases

[toobaz]

• tests passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff

This is basically a consequence of #21503 - the code path for indexing when key is a collection is now the same for multi_take and for single take.

(Next step will be to merge the other code paths too, and approach with multi_take all cases in which mutiple axes are being indexed, in whatever fashion)

[jreback]

lgtm. merge on green.

[codecov]

Codecov Report

Merging #21569 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #21569      +/-   ##
==========================================
- Coverage   91.92%   91.92%   -0.01%     
==========================================
  Files         153      153              
  Lines       49561    49553       -8     
==========================================
- Hits        45559    45551       -8     
  Misses       4002     4002

Flag	Coverage Δ
#multiple	90.32% <100%> (-0.01%)	⬇️
#single	41.8% <50%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
pandas/core/indexing.py	93.37% <100%> (-0.05%)	⬇️

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