3D Raycasts don't detect areas overlapping with the emission point when using Bullet physics

[balloonpopper]

Godot version

3.4.rc1

System information

Windows 10

Issue description

When using a Raycast node to detect an Area, as soon as part of that area overlaps with the ray emission point, the ray fails to detect the collision. This issue pertains to Bullet physics, Godot physics is unaffected.

Steps to reproduce

Move an area over the emission point of a raycast.

Minimal reproduction project

RaycastProject.zip

[balloonpopper]

After further hunting, this is discussed in #41347. I would argue that because this behavior is inconsistent with Godot Physics that it is a bug that should be tracked under #45333
If the end decision is that the default behaviour out of the box is to not detect areas that originate inside the shape we'll need to call that out in the documentation, but whichever way the decision goes, I think we should present a solution to get the alternate behaviour as part of the documentation.

[pouleyKetchoupp]

Closing as duplicate of #49055.