fix: Color consistency

[geido]

SUMMARY

This PR adds the ability to reset the forced colors of a namespace. It also returns a fresh new color scale instance every time in order for the ordinal scale to work as intended.

This PR is a prerequisite for the related Superset PR apache/superset#17089

TESTING INSTRUCTIONS

Please follow each test case in the related Superset PR apache/superset#17089

ADDITIONAL INFORMATION

Associated issues: apache/superset#11677 apache/superset#16970 apache/superset#16891 apache/superset#16961 apache/superset#16980 apache/superset#16979

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[codecov]

Codecov Report

Merging #1406 (38909cb) into master (6bf1c57) will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1406      +/-   ##
==========================================
- Coverage   30.43%   30.39%   -0.04%     
==========================================
  Files         497      497              
  Lines       10000     9995       -5     
  Branches     1689     1688       -1     
==========================================
- Hits         3043     3038       -5     
  Misses       6711     6711              
  Partials      246      246              

Impacted Files	Coverage Δ
...perset-ui-chart-controls/src/sections/sections.tsx	100.00% <ø> (ø)
...et-ui-chart-controls/src/shared-controls/index.tsx	35.71% <ø> (-0.29%)	⬇️
packages/superset-ui-chart-controls/src/types.ts	100.00% <ø> (ø)
...set-ui-core/src/color/CategoricalColorNamespace.ts	95.23% <0.00%> (-4.77%)	⬇️
...uperset-ui-core/src/color/CategoricalColorScale.ts	100.00% <ø> (ø)
...gins/legacy-plugin-chart-chord/src/controlPanel.ts	0.00% <ø> (ø)
.../legacy-plugin-chart-histogram/src/controlPanel.ts	0.00% <ø> (ø)
...legacy-plugin-chart-partition/src/controlPanel.tsx	0.00% <ø> (ø)
...gins/legacy-plugin-chart-rose/src/controlPanel.tsx	0.00% <ø> (ø)
...egacy-plugin-chart-sankey-loop/src/controlPanel.ts	0.00% <ø> (ø)
... and 20 more

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[kgabryje]

2 non blocking comments, looks good!

[serenajiang]

Hi @geido, in our last weekly release, we saw a bug where Time Series Area Charts have no fill color. I am guessing it is related to this change. Can you take a look?

Current behavior (superset apache/master, 2021-11-04)

Previous behavior (superset apache/master, 2021-10-28)

[kgabryje]

Hey @serenajiang! This bug was introduced in #1447 and has been fixed by #1464. The fix should be included in superset-ui 0.18.23.
CC @villebro