Make additional library dependencies optional

[amrit110]

PR Type ([Feature | Fix | Documentation | Test])

Improvement to use of dependencies

Short Description

• Make modelling libraries like torch, xgboost optional
• Make alibi, alibi-detect, torchxrayvision, torchvision optional

Tests Added

...

[codecov]

Codecov Report

Merging #515 (de5ae14) into main (81fc151) will increase coverage by 0.47%.
The diff coverage is 70.11%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #515      +/-   ##
==========================================
+ Coverage   64.36%   64.83%   +0.47%     
==========================================
  Files          94       94              
  Lines        9282     9248      -34     
==========================================
+ Hits         5974     5996      +22     
+ Misses       3308     3252      -56     

Files	Coverage Δ
cyclops/tasks/base.py	84.50% <100.00%> (ø)
cyclops/data/transforms.py	51.51% <83.33%> (+3.23%)	⬆️
cyclops/data/utils.py	41.17% <80.00%> (+1.17%)	⬆️
cyclops/models/utils.py	80.64% <80.00%> (-11.67%)	⬇️
cyclops/models/wrappers/pt_model.py	81.07% <66.66%> (+1.02%)	⬆️
cyclops/tasks/classification.py	32.65% <80.00%> (+0.70%)	⬆️
cyclops/tasks/utils.py	55.55% <80.00%> (+1.01%)	⬆️
cyclops/models/neural_nets/gru.py	43.47% <71.42%> (+1.37%)	⬆️
cyclops/models/neural_nets/lstm.py	88.00% <71.42%> (-7.24%)	⬇️
cyclops/models/neural_nets/mlp.py	36.11% <75.00%> (+1.73%)	⬆️
... and 11 more