Unable to reference auto-generated qproperty flags in another flag

[LeonMatthesKDAB]

Currently, this does not work:

#[qobject]
#[qproperty(i32, number, READ, WRITE, NOTIFY)]
#[qproperty(QString, string, READ, WRITE, NOTIFY=number_changed)] // <-- CXX-Qt will error that number_changed doesn't exist.
type MyObject = super::MyObjectRust;

However, the number_changed signal is being generated by the number property.
This sounds like an issue with name resolution, as the generated values are being added too late.

We got feedback from the training yesterday that this is pretty unexpected, especially as you can use the signal outside the bridge, and it is also an error to declare your own signal with that same name.

[LeonMatthesKDAB]

cc @BenFordTytherington