### Godot version

v4.1.dev.custom_build.a7276f1ce

### System information

Win10, AMD 2600, GeForce GTX 1060, Vulkan API 1.3.205

### Issue description

I can't get correct color data from an array of source_color type.
The color data is saved as **Color** in the file:
`shader_parameter/palette = [Color (1, 0, 0, 1), Color (0, 1, 0, 1), Color (0, 0, 1, 1)]`
Shouldn't it be saved as PackedColorArray?


### Steps to reproduce

1.Declare an array of source_color type.
2.Set colors.

### Minimal reproduction project

[shadertest.zip](https://github.com/godotengine/godot/files/11246504/shadertest.zip)

Node *n = _parse_and_reduce_expression(p_block, p_function_info);
					if (!n) {
						return ERR_PARSE_ERROR;
					}
					if (is_const && n->type == Node::NODE_TYPE_OPERATOR && static_cast<OperatorNode *>(n)->op == OP_CALL) {
						OperatorNode *op = static_cast<OperatorNode *>(n);
						for (int i = 1; i < op->arguments.size(); i++) {
							if (!_check_node_constness(op->arguments[i])) {
								_set_error(vformat(RTR("Expected constant expression for argument %d of function call after '='."), i - 1));
								return ERR_PARSE_ERROR;
							}
						}
					}
					if (n->type == Node::NODE_TYPE_CONSTANT) {
						ConstantNode *const_node = static_cast<ConstantNode *>(n);
						if (const_node && const_node->values.size() == 1) {
							var.value = const_node->values[0];
						}
					}
					if (!_compare_datatypes(var.type, var.struct_name, var.array_size, n->get_datatype(), n->get_datatype_name(), n->get_array_size())) {
						return ERR_PARSE_ERROR;
					}
					decl.initializer.push_back(n);
					tk = _get_token();
				} else {
					if (is_const) {
						_set_error(RTR("Expected initialization of constant."));
						return ERR_PARSE_ERROR;
					}
				}