### Tested versions

Reproducible in: 4.2.1 - RC1
Not reproducible in: 4.2

### System information

Windows 11 - Godot 4.2 - Compatibility

### Issue description

When using a GPUParticles2D in Godot 4.2.1-RC1 no particles are rendered on screen

### Steps to reproduce

Create a project using 4.2.1-RC1
Set the rending mode to Compatibility.
Create a GPUParticles2D system.
No particles are rendered.

### Minimal reproduction project (MRP)

[ParticlesTest.zip](https://github.com/godotengine/godot/files/13621559/ParticlesTest.zip)
uint32_t instance_color_offset = 0;
			bool instance_uses_color = false;
			bool instance_uses_custom_data = false;
			bool use_instancing = false;
			if (state.canvas_instance_batches[p_index].command_type == Item::Command::TYPE_MESH) {
				const Item::CommandMesh *m = static_cast<const Item::CommandMesh *>(state.canvas_instance_batches[p_index].command);
				mesh = m->mesh;
				mesh_instance = m->mesh_instance;
			} else if (state.canvas_instance_batches[p_index].command_type == Item::Command::TYPE_MULTIMESH) {
				const Item::CommandMultiMesh *mm = static_cast<const Item::CommandMultiMesh *>(state.canvas_instance_batches[p_index].command);
				RID multimesh = mm->multimesh;
				mesh = mesh_storage->multimesh_get_mesh(multimesh);
				if (mesh_storage->multimesh_get_transform_format(multimesh) != RS::MULTIMESH_TRANSFORM_2D) {
					break;
				}
				instance_count = mesh_storage->multimesh_get_instances_to_draw(multimesh);
				if (instance_count == 0) {
					break;
				}
				instance_buffer = mesh_storage->multimesh_get_gl_buffer(multimesh);
				instance_stride = mesh_storage->multimesh_get_stride(multimesh);
				instance_color_offset = mesh_storage->multimesh_get_color_offset(multimesh);
				instance_uses_color = mesh_storage->multimesh_uses_colors(multimesh);
				instance_uses_custom_data = mesh_storage->multimesh_uses_custom_data(multimesh);
				use_instancing = true;
			} else if (state.canvas_instance_batches[p_index].command_type == Item::Command::TYPE_PARTICLES) {
				const Item::CommandParticles *pt = static_cast<const Item::CommandParticles *>(state.canvas_instance_batches[p_index].command);
				RID particles = pt->particles;
				mesh = particles_storage->particles_get_draw_pass_mesh(particles, 0);
				ERR_BREAK(particles_storage->particles_get_mode(particles) != RS::PARTICLES_MODE_2D);