Updates to tools for unblinding checks

[kmohrman]

This PR includes most of the minor updates I've been making since we began unblinding, but none of these changes should actually impact the results (i.e. they do not change our analysis pkl files, or the datacards etc., they only provide updates to our tools for the studies we've been doing since unblinding).

I don't think this PR is ready to be merged, as most of the changes are quite messy. However, I wanted to make the PR now, just so I can get an idea of what changes are included here, and clean things up when I get a chance, so that we can eventually get this into the master (since it's getting to the point where I'd like to have at least some of these updates in the master branch).

[codecov]

Codecov Report

Merging #320 (9cd0cbf) into master (c21be48) will decrease coverage by 0.12%.
The diff coverage is 19.06%.

@@            Coverage Diff             @@
##           master     #320      +/-   ##
==========================================
- Coverage   27.06%   26.93%   -0.13%     
==========================================
  Files          47       47              
  Lines        7265     7543     +278     
==========================================
+ Hits         1966     2032      +66     
- Misses       5299     5511     +212     

Flag	Coverage Δ
unittests	26.93% <19.06%> (-0.13%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
analysis/topEFT/get_datacard_yields.py	0.00% <0.00%> (ø)
analysis/topEFT/make_cr_and_sr_plots.py	0.00% <0.00%> (ø)
topcoffea/modules/YieldTools.py	46.24% <34.81%> (-6.78%)	⬇️
analysis/topEFT/get_yield_json.py	91.66% <100.00%> (ø)
topcoffea/modules/utils.py	24.47% <0.00%> (+0.69%)	⬆️
topcoffea/modules/WCFit.py	13.96% <0.00%> (+1.50%)	⬆️
topcoffea/modules/WCPoint.py	46.87% <0.00%> (+25.00%)	⬆️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[kmohrman]

Note that the updates to the topeft.py processor and selection.py are probably not relevant enough to necessitate merging into the master (the updates were mostly for the additional variables and histograms we looked into during the unblinding cross checks), so I have restored these files to the master branch version.

The modifications have been moved to the additional-histos branch, documented on this closed PR 325

[kmohrman]

I think this PR should now be ready to be merged (assuming CI passes). The updates are mainly to the tools we use to study the output pkl files (the plotter script, and the yield getting scripts), so this PR should have no impact whatsoever on the actual content of the output pkl file.

[bryates]

Thanks for adding all of this. I don't have any comments, other than some commented code that we could probably remove.