### 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)

material = RenderingServer::get_singleton()->material_create();
	render_priority = 0;
}
Material::~Material() {
	ERR_FAIL_NULL(RenderingServer::get_singleton());
	RenderingServer::get_singleton()->free(material);
}
bool ShaderMaterial::_set(const StringName &p_name, const Variant &p_value) {
	if (shader.is_valid()) {
		const StringName *sn = remap_cache.getptr(p_name);
		if (sn) {
			set_shader_parameter(*sn, p_value);
			return true;
		}
		String s = p_name;
		if (s.begins_with("shader_parameter/")) {
			String param = s.replace_first("shader_parameter/", "");
			remap_cache[s] = param;
			set_shader_parameter(param, p_value);
			return true;
		}
#ifndef DISABLE_DEPRECATED