feat(eui): change tooltip default font size to 12px

Author: weronikaolejniczak

packages/eui/src/components/tool_tip/tool_tip.styles.ts

@@ -44,7 +44,7 @@ export const euiToolTipStyles = (euiThemeContext: UseEuiTheme) => {
       ${logicalCSS('max-width', '256px')}
       overflow-wrap: break-word;
       padding: ${euiTheme.size.s};
-      ${euiFontSize(euiThemeContext, 's')}
+      ${euiFontSize(euiThemeContext, 'xs')}
 
       position: absolute;
 
@@ -59,10 +59,6 @@ export const euiToolTipStyles = (euiThemeContext: UseEuiTheme) => {
           ease-out ${euiTheme.animation.fast} both;
       }
     `,
-    // Sizes
-    s: css`
-      ${euiFontSize(euiThemeContext, 'xs')}
-    `,
     // Positions - kept for component compatibility. Animation is in the base style.
     top: css``,
     bottom: css``,