[ML] AIOps Fixing style of pattern analysis controls in Discover (#18…

…9883)

Additional class is needed for the buttons to render correctly.

**Fixed**

![image](https://github.com/user-attachments/assets/b475ce2e-f65c-4e23-b548-cdd4aedfc182)

**Broken**


![image](https://github.com/user-attachments/assets/d037560c-37b1-47ed-b676-d75918e94ba2)

x-pack/plugins/aiops/public/components/log_categorization/log_categorization_for_embeddable/discover_tabs.tsx

@@ -62,7 +62,7 @@ export const DiscoverTabs: FC<Props> = ({
   query,
 }) => {
   return (
-    <EuiFlexItem grow={false}>
+    <EuiFlexItem grow={false} className="unifiedDataTableToolbar">
       <EuiFlexGroup gutterSize="none">
         <EuiFlexItem grow={false}>{renderViewModeToggle(data?.categories.length)}</EuiFlexItem>
         <EuiFlexItem />