chore: cluster termonal node issue fix

Author: shivani170

src/components/ClusterNodes/ClusterTerminal.tsx

@@ -861,14 +861,34 @@ node-details-full-screen
 
     const fullScreenClassWrapper = isFullScreen ? 'cluster-full_screen' : 'cluster-terminal-view-container'
 
+    const getNodeGroupOptions = () => {
+        const nodeGroupOptions = nodeGroups.reduce((acc, group) => {
+            if (group.label) {
+                acc.push({
+                    label: group.label,
+                    options: group.options,
+                })
+            } else {
+                const options = group.options.map((option) => ({
+                    label: option.label,
+                    value: option.value,
+                }))
+                acc.push(...options) // Flatten the array into the accumulator
+            }
+            return acc
+        }, [])
+
+        return nodeGroupOptions
+    }
+
     const selectionListData: TerminalSelectionListDataType = {
         firstRow: [
             {
                 type: TerminalWrapperType.REACT_SELECT,
                 classNamePrefix: 'cluster-terminal-node',
                 title: SELECT_TITLE.NODE,
                 placeholder: 'Select node',
-                options: nodeGroups,
+                options: getNodeGroupOptions(),
                 defaultValue: selectedNodeName,
                 value: selectedNodeName,
                 onChange: onChangeNodes,