Add new "middle-out" order prop option to `OuiPaletteColorBlind'

[joshuarrrr]

Description

When dealing with a large number of rotations, you may not always want to start with the darkest variations. This order makes sure the darkest and lightest variants come last.

Issues Resolved

Check List

• New functionality includes testing.
• New functionality has been documented.
• All tests pass
  • yarn lint
  • yarn test-unit
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[BSFishy]

Would like to get @KrooshalUX opinion on this

[joshuarrrr]

To provide a little more context - there are some legacy vis color utils in OpenSearch Dashboards that try to generate an arbitrary/infinite number of categorical colors. In practice, this generation is not done very well, and very quickly it starts generating very similar colors that are not differentiable:
(from #601)

I believe that the long term solution is to focus on differentiability for categorical colors, and to simply repeat/re-use categorical colors rather than using technically distinct ones.

But for now, the easiest way to at least use OUI colors as a source of truth was to leverage the rotation ability of OuiPaletteColorBlind to generate arbitrarily large palettes. The problem, however, is that by default, using the append order, the first 10 colors assigned would be those from the darkest rotation and the last would be those from the lightest rotation, which we know to be the "worst" colors in the total palette. Because order of assignment matters, we want a way to start with the best colors (non-rotated), and use the worst colors last.

[BSFishy]

The more I'm seeing super dark or super light colors on Dashboards, the more I'm thinking I'd like this

[joshuarrrr]

I'll leave this as a possibility, but leaning more toward opensearch-project/OpenSearch-Dashboards#4697

[joshuarrrr]

I'm taking this out of draft, because I'm still convinced it's useful for visualizations with >10 series. Particularly when stacking bar or area charts, it's common to sort the series so that the series with the largest magnitude come first. In this common scenario, you want the primary vis colors to come first and then start using variants.