### 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)

}
									from += "[";
									from += itos(array_size2);
									from += "]'";
									String to;
									if (precision != PRECISION_DEFAULT) {
										to += get_precision_name(precision);
										to += " ";
									}
									if (type == TYPE_STRUCT) {
										to += struct_name;
									} else {
										to += get_datatype_name(type);
									}
									to += "[";
									to += itos(var.array_size);
									to += "]'";
									_set_error(vformat(RTR("Cannot convert from '%s' to '%s'."), from, to));
									return ERR_PARSE_ERROR;
								}
							}
							bool curly = tk.type == TK_CURLY_BRACKET_OPEN;
							if (unknown_size) {
								if (!curly) {
									_set_expected_error("{");
									return ERR_PARSE_ERROR;
								}
							} else {
								if (full_def) {
									if (curly) {