_gui_input is not propagated to parent for keyboard and joy inputs

### Tested versions

- Tested in 4.3.stable

### System information

Godot v4.3.stable - Windows 10.0.22631 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 with Max-Q Design (NVIDIA; 31.0.15.5123) - Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz (12 Threads)

### Issue description

_gui_input is only called on the focused control for keyboard and joypad inputs and is not propagated to parent even if accept_event is NOT called.
Note that is does not affect mouse events (when the mouse_filter of the child is set to Pass).

### Steps to reproduce

- Launch the MRP, the button on screen will be automatically focused
- Press space, notice in the output that _gui_input is only called on the child.
- Notice that if you move the mouse on the button or even click on it, _gui_input is called on both the child and the parent.

### Minimal reproduction project (MRP)

[bug-gui-input-propagation.zip](https://github.com/user-attachments/files/17579412/bug-gui-input-propagation.zip)

Start by running the linked minimal reproduction project and tracing _gui_input handling for focused keyboard and joypad events versus mouse events. Confirm the expected propagation from the child Control to its parent, then add or update a regression test showing that parent callbacks occur when accept_event is not called.

Written by the indexing model from the issue text.