chore: Removes hard-coded colors from legacy-plugin-chart-world-map

[michael-s-molina]

SUMMARY

Removes hard-coded colors from legacy-plugin-chart-world-map.

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 #19466 (563ebd6) into master (6b136c2) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master   #19466      +/-   ##
==========================================
- Coverage   66.57%   66.57%   -0.01%     
==========================================
  Files        1675     1675              
  Lines       64092    64093       +1     
  Branches     6519     6519              
==========================================
  Hits        42672    42672              
- Misses      19729    19730       +1     
  Partials     1691     1691              

Flag	Coverage Δ
javascript	51.25% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...egacy-plugin-chart-world-map/src/ReactWorldMap.jsx	0.00% <0.00%> (ø)

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