(#22414) Rename for consistency `$custom-control-disabled-indicator-bg`, `$custom...

(#22414) Rename for consistency `$custom-control-disabled-indicator-bg`, `$custom-control-disabled-description-color`, `$custom-control-checked-indicator-color`, `$custom-control-checked-indicator-bg`, `$custom-control-checked-indicator-box-shadow`, `$custom-control-focus-indicator-box-shadow`, `$custom-control-active-indicator-color`, `$custom-control-active-indicator-bg`, `$custom-control-active-indicator-box-shadow` to `$custom-control-indicator-disabled-bg`, `$custom-control-description-disabled-color`, `$custom-control-indicator-checked-color`, `$custom-control-indicator-checked-bg`, `$custom-control-indicator-checked-box-shadow`, `$custom-control-indicator-focus-box-shadow`, `$custom-control-indicator-active-color`, `$custom-control-indicator-active-bg`, `$custom-control-indicator-active-box-shadow`, respectively