test: Add tests for the Dashboard FilterBar CascadeFilterControl component

[geido]

SUMMARY

Adds the tests for the Dashboard FilterBar CascadeFilterControl component.

TEST PLAN

All tests should pass

[rusackas]

LGTM!

[rusackas]

@geido this appears to just need a lil' rebase, and then I'm happy to merge.

[codecov]

Codecov Report

Merging #13950 (2c648a2) into master (8b9c142) will increase coverage by 0.69%.
The diff coverage is 100.00%.

❗ Current head 2c648a2 differs from pull request most recent head c651072. Consider uploading reports for the commit c651072 to get more accurate results

@@            Coverage Diff             @@
##           master   #13950      +/-   ##
==========================================
+ Coverage   77.87%   78.57%   +0.69%     
==========================================
  Files         935      935              
  Lines       47375    47375              
  Branches     5964     5964              
==========================================
+ Hits        36895    37224     +329     
+ Misses      10323    10007     -316     
+ Partials      157      144      -13     

Flag	Coverage Δ
cypress	56.03% <ø> (+5.27%)	⬆️
javascript	67.12% <100.00%> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
...rBar/CascadeFilters/CascadeFilterControl/index.tsx	85.71% <100.00%> (ø)
.../FilterBar/CascadeFilters/CascadePopover/index.tsx	83.09% <100.00%> (ø)
superset-frontend/src/SqlLab/actions/sqlLab.js	63.26% <0.00%> (+0.20%)	⬆️
.../src/explore/components/ControlPanelsContainer.tsx	97.34% <0.00%> (+0.88%)	⬆️
...nd/src/explore/components/ExploreViewContainer.jsx	77.77% <0.00%> (+1.16%)	⬆️
...et-frontend/src/components/EditableTitle/index.tsx	75.30% <0.00%> (+1.23%)	⬆️
superset-frontend/src/reduxUtils.ts	81.01% <0.00%> (+1.26%)	⬆️
...ntend/src/explore/components/ExploreChartPanel.jsx	82.60% <0.00%> (+1.44%)	⬆️
superset-frontend/src/chart/Chart.jsx	64.81% <0.00%> (+1.85%)	⬆️
...rontend/src/visualizations/FilterBox/FilterBox.jsx	73.58% <0.00%> (+1.88%)	⬆️
... and 42 more

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