Rename SlicingClassifier -> SliceAwareClassifier

[vincentschen]

Description of proposed changes

Renamed class

Test plan

Fixed corresponding tests

Checklist

Need help on these? Just ask!

• I have read the CONTRIBUTING document.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• I have run tox -e complex and/or tox -e spark if appropriate.
• All new and existing tests passed.

[bhancock8]

I like it! I think this helps to emphasize that you can do monitoring of slices with other classifiers using the tools we provide, but this is a classifier that will actively utilize that information. LGTM once tests pass!

[codecov]

Codecov Report

Merging #1453 into master will decrease coverage by 0.05%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1453      +/-   ##
==========================================
- Coverage   97.55%   97.49%   -0.06%     
==========================================
  Files          55       55              
  Lines        2002     2078      +76     
  Branches      328      356      +28     
==========================================
+ Hits         1953     2026      +73     
- Misses         22       24       +2     
- Partials       27       28       +1

Impacted Files	Coverage Δ
snorkel/slicing/sliceaware_classifier.py	100% <100%> (ø)
snorkel/labeling/model/label_model.py	95.42% <0%> (+0.17%)	⬆️