### 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)

if (!n) {
					_set_error(RTR("Invalid data type for the array."));
					return nullptr;
				}
				if (!_compare_datatypes(p_type, p_struct_name, p_array_size, n->get_datatype(), n->get_datatype_name(), n->get_array_size())) {
					return nullptr;
				}
				return n;
			}
			type = get_token_datatype(tk.type);
		}
		tk = _get_token();
		if (tk.type == TK_BRACKET_OPEN) {
			bool is_unknown_size = false;
			Error error = _parse_array_size(p_block, p_function_info, false, nullptr, &array_size, &is_unknown_size);
			if (error != OK) {
				return nullptr;
			}
			if (is_unknown_size) {
				array_size = p_array_size;
			}
			tk = _get_token();
		} else {
			_set_expected_error("[");
			return nullptr;
		}
		if (type != p_type || struct_name != p_struct_name || array_size != p_array_size) {
			String from;
			if (type == TYPE_STRUCT) {
				from += struct_name;