[Vis colors] Replace observability trace analytics color palettes with palettes generated with colorPalette and OUI color variables

[joshuarrrr]

Observability trace analytics visualizations use different quantitative color scales than all other OpenSearch Dashboard visualizations:

https://github.com/opensearch-project/dashboards-observability/blob/main/public/components/trace_analytics/components/common/color_palette.ts

(For visual comparison, see opensearch-project/oui#601)

All visualizations should default to the standardized color scales defined in OpenSearch Dashboards, or at least use the OUI color utility colorPalette() to generate similar scales.

For a similar mitigation, see opensearch-project/OpenSearch-Dashboards#4325

[vvavdiya]

@joshuarrrr @ps48
I would like to look into issue incase any change is pending