ZBillboard particle align doesn't work with particle material angle

[QbieShay]

Godot version

v4.0.dev.custom_build [1acc76f]

System information

Linux

Issue description

In GPUParticles (tried only 3D) setting transform_align to ZBillboard disregards the angle property of the process material.

I'm not sure how this should be solved, probably just removing the ZBillboard property? Otherwise custom particle shaders might break.

Steps to reproduce

• Create 3D scene
• Create GPU Particles
• Assign a quad mesh
• Assign process material
• Add angle/angle velocity to the process material
• Observe that the angle property is disregarded

Minimal reproduction project

No response

[QbieShay]

Bumping to 4.1 since it's not a low hanging fruit and requries a bigger conversation on how to apply transform aligns properly.