### 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)

_set_expected_error("}", ",");
										} else {
											_set_expected_error(")", ",");
										}
										return ERR_PARSE_ERROR;
									}
								}
								if (unknown_size) {
									decl.size = decl.initializer.size();
									var.array_size = decl.initializer.size();
								} else if (decl.initializer.size() != var.array_size) {
									_set_error(RTR("Array size mismatch."));
									return ERR_PARSE_ERROR;
								}
								tk = _get_token();
							}
						}
					} else {
						if (unknown_size) {
							_set_error(RTR("Expected array initialization."));
							return ERR_PARSE_ERROR;
						}
						if (is_const) {
							_set_error(RTR("Expected initialization of constant."));
							return ERR_PARSE_ERROR;
						}
					}
					array_size = var.array_size;
				} else if (tk.type == TK_OP_ASSIGN) {