### 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 (constant.precision != precision2 || constant.type != type2 || struct_name != struct_name2 || constant.array_size != array_size2) {
										String from;
										if (type2 == TYPE_STRUCT) {
											from += struct_name2;
										} else {
											if (precision2 != PRECISION_DEFAULT) {
												from += get_precision_name(precision2);
												from += " ";
											}
											from += get_datatype_name(type2);
										}
										from += "[";
										from += itos(array_size2);
										from += "]'";
										String to;
										if (type == TYPE_STRUCT) {
											to += struct_name;
										} else {
											if (precision != PRECISION_DEFAULT) {
												to += get_precision_name(precision);
												to += " ";
											}
											to += get_datatype_name(type);
										}
										to += "[";
										to += itos(constant.array_size);
										to += "]'";
										_set_error(vformat(RTR("Cannot convert from '%s' to '%s'."), from, to));
										return ERR_PARSE_ERROR;