Physics Mouse Picking happens in SubViewport even with MOUSE_FILTER_IGNORE

[Sauermann]

Godot version

v4.2.dev.custom_build [60f3b79]

System information

Debian Linux X11 Xfce

Issue description

Physics Picking within a SubViewport happens with InputEventMouse even when mouse events are disabled via SubViewportContainer.mouse_filter = Control.MOUSE_FILTER_IGNORE

The problem is that passive hovering still happens in the SubViewport with SubViewportContainer.mouse_filter = Control.MOUSE_FILTER_IGNORE.

I assume that it is a regression from #78017.

This was initially reported as a side-effect in #79271, which got closed, because the main issue was resolved.

Steps to reproduce

1. Load and run MRP
2. move mouse over Icon

I would expect, that the Area2D receives no InputEventMouse, however it gets _input_event and also mouse-entered and mouse-exited signals.

Minimal reproduction project

IgnorePassiveHover.zip