### 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 (s.begins_with("param/")) {
			s = s.replace_first("param/", "shader_parameter/");
		} else if (s.begins_with("shader_param/")) {
			s = s.replace_first("shader_param/", "shader_parameter/");
		} else if (s.begins_with("shader_uniform/")) {
			s = s.replace_first("shader_uniform/", "shader_parameter/");
		} else {
			return false; 
		}
		WARN_PRINT("This material (containing shader with path: '" + shader->get_path() + "') uses an old deprecated parameter names. Consider re-saving this resource (or scene which contains it) in order for it to continue working in future versions.");
		String param = s.replace_first("shader_parameter/", "");
		remap_cache[s] = param;
		set_shader_parameter(param, p_value);
		return true;
#endif
	}
	return false;
}
bool ShaderMaterial::_get(const StringName &p_name, Variant &r_ret) const {
	if (shader.is_valid()) {
		const StringName *sn = remap_cache.getptr(p_name);
		if (sn) {
			
			r_ret = get_shader_parameter(*sn);
			return true;
		}
	}
	return false;
}
void ShaderMaterial::_get_property_list(List<PropertyInfo> *p_list) const {