GPUParticles2D collisions don't work correctly when using particle animations

[reimgrab]

Tested versions

4.2.stable

System information

Godot v4.2.2.stable.mono - Ubuntu 22.04.4 LTS 22.04 - X11 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1050 Ti (nvidia; 535.171.04) - Intel(R) Core(TM) i5-6600 CPU @ 3.30GHz (4 Threads)

Issue description

GPUParticles2d collisions are using a wrong collision size when particle animations are used.
gpuparticles2d_bug.webm

The expected behaviour in the shown example is that both particles collide the same with the floor.
gpuparticles2d_fixed.webm

Steps to reproduce

-Add a GPUParticles2D to a scene
-Add a sprite sheet texture to it
-Add a CanvasItemMaterial
-Enable particles animation on the material and set its v_ and h_frames

Minimal reproduction project (MRP)

gpuparticles2d_bug.zip

The above shown expected behaviour can be achieved with this patch (against 4.3 master):

diff --git a/scene/2d/gpu_particles_2d.cpp b/scene/2d/gpu_particles_2d.cpp
index bc39513c03..6dc33567b1 100644
--- a/scene/2d/gpu_particles_2d.cpp
+++ b/scene/2d/gpu_particles_2d.cpp
@@ -216,7 +216,14 @@ void GPUParticles2D::_update_collision_size() {
 	real_t csize = collision_base_size;
 
 	if (texture.is_valid()) {
-		csize *= (texture->get_width() + texture->get_height()) / 4.0; //half size since its a radius
+		int twidth = texture->get_width();
+		int theight = texture->get_height();
+		CanvasItemMaterial *mat = Object::cast_to<CanvasItemMaterial>(get_material().ptr());
+		if (mat && mat->get_particles_animation()) {
+			twidth /= mat->get_particles_anim_h_frames();
+			theight /= mat->get_particles_anim_v_frames();
+		}
+		csize *= (twidth + theight) / 4.0; //half size since its a radius
 	}
 
 	RS::get_singleton()->particles_set_collision_base_size(particles, csize);