Improvements to pca() and pca_annular() and possibility to calculate results for an input ncomp list

[VChristiaens]

These features are useful for coupling with Applefy.

[codecov-commenter]

Codecov Report

Merging #617 (f693bed) into master (aef1e24) will decrease coverage by 0.15%.
Report is 1 commits behind head on master.
The diff coverage is 31.58%.

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@@            Coverage Diff             @@
##           master     #617      +/-   ##
==========================================
- Coverage   57.53%   57.38%   -0.15%     
==========================================
  Files          67       67              
  Lines       13471    13544      +73     
==========================================
+ Hits         7750     7772      +22     
- Misses       5721     5772      +51     

Files Changed	Coverage Δ
vip_hci/fits/fits.py	45.57% <0.00%> (ø)
vip_hci/invprob/andromeda.py	10.62% <0.00%> (+0.05%)	⬆️
vip_hci/objects/postproc.py	63.16% <0.00%> (ø)
vip_hci/preproc/parangles.py	23.88% <0.00%> (ø)
vip_hci/preproc/recentering.py	66.52% <0.00%> (ø)
vip_hci/psfsub/svd.py	18.70% <0.00%> (ø)
vip_hci/psfsub/utils_pca.py	19.19% <0.00%> (-0.14%)	⬇️
vip_hci/psfsub/pca_fullfr.py	50.00% <23.33%> (-1.44%)	⬇️
vip_hci/psfsub/pca_local.py	62.86% <37.88%> (-4.56%)	⬇️
vip_hci/objects/pppca.py	70.54% <47.37%> (-0.29%)	⬇️
... and 1 more

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