### 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)

}
					} else if (tk.type != TK_SEMICOLON) {
						_set_expected_error(";", ".");
						return ERR_PARSE_ERROR;
					}
				} else {
					if (tk.type != TK_SEMICOLON) {
						if (current_uniform_group_name.is_empty()) {
							_set_error(RTR("Expected an uniform group identifier."));
						} else {
							_set_error(RTR("Expected an uniform group identifier or `;`."));
						}
						return ERR_PARSE_ERROR;
					} else if (current_uniform_group_name.is_empty()) {
						_set_error(RTR("Group needs to be opened before."));
						return ERR_PARSE_ERROR;
					} else {
						current_uniform_group_name = "";
						current_uniform_subgroup_name = "";
					}
				}
			} break;
			case TK_SHADER_TYPE: {
				_set_error(RTR("Shader type is already defined."));
				return ERR_PARSE_ERROR;
			} break;
			default: {
				
				bool is_constant = false;
				bool is_struct = false;