Add clear button to social links (#68564)

Add Clear buttons to the icon color and icon background color options on the social links block, to improve consistency with other options.

Co-authored-by: shimotmk <[email protected]>

packages/block-library/src/social-links/edit.js

@@ -269,6 +269,7 @@ export function SocialLinksEdit( props ) {
 										isShownByDefault: true,
 										resetAllFilter,
 										enableAlpha: true,
+										clearable: true,
 									},
 								] }
 								panelId={ clientId }