### 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 (has_builtin(p_functions, name)) {
								_set_redefinition_error(String(name));
								return ERR_PARSE_ERROR;
							}
							tk = _get_token();
							if (!fixed_array_size) {
								array_size = 0;
							}
							unknown_size = false;
						} else if (tk.type == TK_SEMICOLON) {
							is_const_decl = false;
							break;
						} else {
							_set_expected_error(",", ";");
							return ERR_PARSE_ERROR;
						}
					}
					break;
				}
				FunctionInfo builtins;
				if (p_functions.has(name)) {
					builtins = p_functions[name];
				}
				if (p_functions.has("global")) { 
					for (const KeyValue<StringName, BuiltInInfo> &E : p_functions["global"].built_ins) {
						builtins.built_ins.insert(E.key, E.value);
					}
				}
				if (p_functions.has("constants")) {