Support fit_resample in Synthesizer

[codecov[bot]]

Codecov Report

Merging #55 (26c228e) into main (5148f6d) will increase coverage by 0.12%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #55      +/-   ##
==========================================
+ Coverage   96.13%   96.25%   +0.12%     
==========================================
  Files          49       49              
  Lines        4531     4516      -15     
==========================================
- Hits         4356     4347       -9     
+ Misses        175      169       -6     

Files	Coverage Δ
raimitigations/dataprocessing/data_processing.py	98.90% <ø> (-0.08%)	:arrow_down:
...imitigations/dataprocessing/sampler/synthesizer.py	96.25% <100.00%> (+3.99%)	:arrow_up:

... and 1 file with indirect coverage changes

[yrajas]

Synthesizer now follows fit_resample interface similar to Rebalancer. Also, can now work with CohortManager similarly.