[ML] Fixing memory usage serverless check (#164732)

The check which decides what is shown on the memory usage page for
serverless or stack versions of kibana is the wrong way round.
The node list should be shown in non-serverless environments.

x-pack/plugins/ml/public/application/memory_usage/memory_usage_page.tsx

@@ -51,8 +51,6 @@ export const MemoryUsagePage: FC = () => {
       <SavedObjectsWarning onCloseFlyout={refresh} />
 
       {isADEnabled && isDFAEnabled && isNLPEnabled ? (
-        <JobMemoryTreeMap />
-      ) : (
         <>
           <EuiTabs>
             <EuiTab
@@ -70,6 +68,8 @@ export const MemoryUsagePage: FC = () => {
           </EuiTabs>
           {selectedTab === TAB.NODES ? <NodesList /> : <MemoryPage />}
         </>
+      ) : (
+        <JobMemoryTreeMap />
       )}
     </>
   );