### 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)

GLES3::Shader *shader = shader_owner.get_or_null(p_shader);
	ERR_FAIL_COND(!shader);
	if (p_texture.is_valid() && TextureStorage::get_singleton()->owns_texture(p_texture)) {
		if (!shader->default_texture_parameter.has(p_name)) {
			shader->default_texture_parameter[p_name] = HashMap<int, RID>();
		}
		shader->default_texture_parameter[p_name][p_index] = p_texture;
	} else {
		if (shader->default_texture_parameter.has(p_name) && shader->default_texture_parameter[p_name].has(p_index)) {
			shader->default_texture_parameter[p_name].erase(p_index);
			if (shader->default_texture_parameter[p_name].is_empty()) {
				shader->default_texture_parameter.erase(p_name);
			}
		}
	}
	if (shader->data) {
		shader->data->set_default_texture_parameter(p_name, p_texture, p_index);
	}
	for (Material *E : shader->owners) {
		Material *material = E;
		_material_queue_update(material, false, true);
	}
}
RID MaterialStorage::shader_get_default_texture_parameter(RID p_shader, const StringName &p_name, int p_index) const {