### 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)

r_ret = RS::get_singleton()->global_shader_parameter_get(p_name);
		return r_ret.get_type() != Variant::NIL;
	}
	void _get_property_list(List<PropertyInfo> *p_list) const {
		Vector<StringName> variables;
		variables = RS::get_singleton()->global_shader_parameter_get_list();
		for (int i = 0; i < variables.size(); i++) {
			PropertyInfo pinfo;
			pinfo.name = variables[i];
			switch (RS::get_singleton()->global_shader_parameter_get_type(variables[i])) {
				case RS::GLOBAL_VAR_TYPE_BOOL: {
					pinfo.type = Variant::BOOL;
				} break;
				case RS::GLOBAL_VAR_TYPE_BVEC2: {
					pinfo.type = Variant::INT;
					pinfo.hint = PROPERTY_HINT_FLAGS;
					pinfo.hint_string = "x,y";
				} break;
				case RS::GLOBAL_VAR_TYPE_BVEC3: {
					pinfo.type = Variant::INT;
					pinfo.hint = PROPERTY_HINT_FLAGS;
					pinfo.hint_string = "x,y,z";
				} break;
				case RS::GLOBAL_VAR_TYPE_BVEC4: {
					pinfo.type = Variant::INT;
					pinfo.hint = PROPERTY_HINT_FLAGS;
					pinfo.hint_string = "x,y,z,w";