Create new slices to avoid modify original fake data

When create fake data for the nodeTree unittests, The 'append' is invoked
on the common fake data set. That makes the unittests is running with unexpected
fake data after that.

pkg/scheduler/internal/cache/node_tree_test.go

@@ -428,14 +428,14 @@ func TestNodeTreeMultiOperations(t *testing.T) {
 		},
 		{
 			name:           "add more nodes to an exhausted zone",
-			nodesToAdd:     append(allNodes[4:9], allNodes[3]),
+			nodesToAdd:     append(allNodes[4:9:9], allNodes[3]),
 			nodesToRemove:  nil,
 			operations:     []string{"add", "add", "add", "add", "add", "next", "next", "next", "next", "add", "next", "next", "next"},
-			expectedOutput: []string{"node-4", "node-6", "node-7", "node-8", "node-3", "node-4", "node-6"},
+			expectedOutput: []string{"node-4", "node-5", "node-6", "node-7", "node-3", "node-8", "node-4"},
 		},
 		{
 			name:           "remove zone and add new to ensure exhausted is reset correctly",
-			nodesToAdd:     append(allNodes[3:5], allNodes[6:8]...),
+			nodesToAdd:     append(allNodes[3:5:5], allNodes[6:8]...),
 			nodesToRemove:  allNodes[3:5],
 			operations:     []string{"add", "add", "next", "next", "remove", "add", "add", "next", "next", "remove", "next", "next"},
 			expectedOutput: []string{"node-3", "node-4", "node-6", "node-7", "node-6", "node-7"},