### 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)

EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Add Shader Global Parameter"));
	undo_redo->add_do_method(RS::get_singleton(), "global_shader_parameter_remove", p_variable);
	undo_redo->add_undo_method(RS::get_singleton(), "global_shader_parameter_add", p_variable, RS::get_singleton()->global_shader_parameter_get_type(p_variable), RS::get_singleton()->global_shader_parameter_get(p_variable));
	undo_redo->add_do_property(ProjectSettings::get_singleton(), "shader_globals/" + p_variable, Variant());
	undo_redo->add_undo_property(ProjectSettings::get_singleton(), "shader_globals/" + p_variable, GLOBAL_GET("shader_globals/" + p_variable));
	undo_redo->add_do_method(this, "_changed");
	undo_redo->add_undo_method(this, "_changed");
	undo_redo->commit_action();
}
void ShaderGlobalsEditor::_changed() {