refactor: Removes the CSS files from the Parallel Coordinates plugin

[michael-s-molina]

SUMMARY

This PR removes the CSS files from the Parallel Coordinates plugin using Emotion. It also adjusts the styles to match theme configuration and existing components.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

Check that the plugin is very similar to the previous version. We may have color, font, and opacity differences due to theme adjustments.

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #19539 (73b64f9) into master (1eef923) will increase coverage by 0.05%.
The diff coverage is 70.40%.

❗ Current head 73b64f9 differs from pull request most recent head 8a3625d. Consider uploading reports for the commit 8a3625d to get more accurate results

@@            Coverage Diff             @@
##           master   #19539      +/-   ##
==========================================
+ Coverage   66.60%   66.65%   +0.05%     
==========================================
  Files        1678     1680       +2     
  Lines       64246    64253       +7     
  Branches     6539     6561      +22     
==========================================
+ Hits        42788    42826      +38     
+ Misses      19763    19725      -38     
- Partials     1695     1702       +7     

Flag	Coverage Δ
javascript	51.45% <63.43%> (+0.10%)	⬆️

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

Impacted Files	Coverage Δ
.../legacy-plugin-chart-country-map/src/CountryMap.js	0.00% <ø> (ø)
...y-plugin-chart-country-map/src/ReactCountryMap.jsx	0.00% <0.00%> (ø)
...rt-parallel-coordinates/src/ParallelCoordinates.js	0.00% <ø> (ø)
...allel-coordinates/src/ReactParallelCoordinates.jsx	0.00% <0.00%> (ø)
...y-plugin-chart-sankey-loop/src/ReactSankeyLoop.jsx	0.00% <0.00%> (ø)
.../legacy-plugin-chart-sankey-loop/src/SankeyLoop.js	0.00% <ø> (ø)
...lugin-chart-echarts/src/BigNumber/BigNumberViz.tsx	0.00% <0.00%> (ø)
...src/BigNumber/BigNumberWithTrendline/buildQuery.ts	0.00% <0.00%> (-11.12%)	⬇️
.../BigNumber/BigNumberWithTrendline/controlPanel.tsx	33.33% <ø> (ø)
superset-frontend/src/SqlLab/actions/sqlLab.js	60.39% <0.00%> (-0.35%)	⬇️
... and 64 more

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[geido]

@michael-s-molina do you think it makes sense to use grid units for line heights?

[michael-s-molina]

We'll have a specific category for line-heights in our theme. We just need to figure out which ones should be available and include them with the other theme suggestions for the design team. Let's tackle line-heights in a specific task force.