* Migrate lineal bar charts to carbon
* revert changes made to mirage
* fix failing tests
* fix test failures
* removed the usage of render modifiers
* Update RunningTotal component to handle null values for chart data and adjust test for simple chart rendering
* Enhance RunningTotal component with Carbon Charts integration and accessibility improvements
* Migrate client usage by month bar chart to Carbon Charts with updated options and styles
* Update overview tests to utilize new chart selectors and improve assertions for client stats visibility
* Remove unnecessary nested-interactive a11y rule suppression from carbon-chart tests
* UI: Enhance chart color scales and options for client usage visualization to use HDS color tokens
* Refactor chart-related constants and remove unused functions from chart helpers
* Update date range inputs in client usage overview tests to use constants for historical months
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Co-authored-by: Aravind VM <aravind.vm@ibm.com>
Co-authored-by: Copilot <copilot@github.com>