feat: Add tooltipClasses prop to OverflowTooltip component

Signed-off-by: Caitlin Cooling <ccooling97@gmail.com>

.changeset/rare-rice-throw.md

@@ -0,0 +1,5 @@
+---
+'@backstage/core-components': minor
+---
+
+Add tooltipClasses prop to OverflowTooltip component to allow customisation of the tooltip

packages/core-components/src/components/OverflowTooltip/OverflowTooltip.tsx

@@ -23,6 +23,7 @@ type Props = {
   title?: TooltipProps['title'];
   line?: number | undefined;
   placement?: TooltipProps['placement'];
+  tooltipClasses?: TooltipProps['classes'];
 };
 
 export type OverflowTooltipClassKey = 'container';
@@ -51,6 +52,7 @@ export function OverflowTooltip(props: Props) {
     <Tooltip
       title={props.title ?? (props.text || '')}
       placement={props.placement}
+      classes={props.tooltipClasses}
     >
       <Typography className={classes.typo} variant="inherit">
         {props.text}