Drag forwarding methods not available in autocompletion and documentation

[timothyqiu]

Godot version: master(6054feb) / 3.x(7417467) / 3.3

OS/device including version: not graphics-related

Issue description:

When set_drag_forwarding is set on a Control node, the forward owner's get_drag_data_fw, can_drop_data_fw, and drop_data_fw are used instead of the control's non-postfixed ones.

• Searching the built-in documentation shows no such methods on Control. They are only mentioned in the documentation of set_drag_forwarding.
• There is no autocompletion for these methods. When writing these functions in GDScript, one have to autocomplete the non-postfixed version, and then add the _fw postfix and extra argument. This becomes quite a lot of work when type hints are used.

Steps to reproduce:

• Create a control node, add a script, and try to type get_drag_data_fw.
• Search get_drag_data_fw in help.

Minimal reproduction project: N/A

[timothyqiu]

To anyone interested in solving this: set_drag_forwarding() takes any Object. But binding these forwarding methods to Object seems an overkill. See discussion in #60558.

[HolonProduction]

Can we close this? set_drag_forwarding does take callables now, so while we still do not provide completion, we just can't since there is no fixed name.