Show exact class name/inheritance hierarchy for Call method track in AnimationPlayer

[Kartopod]

When you create a key on a CallMethodTrack and select a node that has a script that inherits another user script, all user-made methods show up under a single section called 'Script Methods'.

The engine methods are already sorted based on class names, so it doesn't make sense that user made methods don't also do the same. This get's especially unusable when using virtual methods, since the same names appear multiple times, and the user has no way to know which class the method belongs to.

[dalexeev]

• I noticed this while working on Editor: Improve Signal Dock for script classes godot#80411.
• This is fixed in Core: Add parameter no_inheritance to Script.get_script_*_list() methods godot#80418, but it needs to be finished.