### Godot version

v4.2.beta1.official [b1371806a]

### System information

Ubuntu 22.04.3 LTS 22.04 - X11 - GLES3 (Compatibility) - AMD Radeon RX 560 Series (polaris11, LLVM 15.0.7, DRM 3.42, 5.15.0-88-generic) () - AMD Ryzen 3 1200 Quad-Core Processor (4 Threads)

### Issue description

![image](https://github.com/godotengine/godot/assets/1330325/7a986599-5a68-42a4-beb1-5d3b4bf7db6b)
![image](https://github.com/godotengine/godot/assets/1330325/e8b8546b-b47b-4add-9567-7f70709ab03c)

Culling 3D goes bellow 60 fps even with just about 50 simple animated models. With v4.2.dev6.official [57a6813bb] many more models can be spawned without fps drop. However, both versions do show high cpu usage for culling 3D. Without animations there's barely any usage.

### Steps to reproduce

Spawn models with animation with the Compatibility renderer.

### Minimal reproduction project

[CullMRP.zip](https://github.com/godotengine/godot/files/13400514/CullMRP.zip)

actions.render_mode_defines["specular_toon"] = "#define SPECULAR_TOON\n";
		actions.render_mode_defines["specular_disabled"] = "#define SPECULAR_DISABLED\n";
		actions.render_mode_defines["shadows_disabled"] = "#define SHADOWS_DISABLED\n";
		actions.render_mode_defines["ambient_light_disabled"] = "#define AMBIENT_LIGHT_DISABLED\n";
		actions.render_mode_defines["shadow_to_opacity"] = "#define USE_SHADOW_TO_OPACITY\n";
		actions.render_mode_defines["unshaded"] = "#define MODE_UNSHADED\n";
		actions.render_mode_defines["fog_disabled"] = "#define FOG_DISABLED\n";
		actions.default_filter = ShaderLanguage::FILTER_LINEAR_MIPMAP;
		actions.default_repeat = ShaderLanguage::REPEAT_ENABLE;
		actions.check_multiview_samplers = RasterizerGLES3::get_singleton()->is_xr_enabled();
		actions.global_buffer_array_variable = "global_shader_uniforms";
		shaders.compiler_scene.initialize(actions);
	}
	{
		
		ShaderCompiler::DefaultIdentifierActions actions;
		actions.renames["COLOR"] = "out_color";
		actions.renames["VELOCITY"] = "out_velocity_flags.xyz";
		
		actions.renames["ACTIVE"] = "particle_active";
		actions.renames["RESTART"] = "restart";
		actions.renames["CUSTOM"] = "out_custom";
		for (int i = 0; i < PARTICLES_MAX_USERDATAS; i++) {
			String udname = "USERDATA" + itos(i + 1);
			actions.renames[udname] = "out_userdata" + itos(i + 1);
			actions.usage_defines[udname] = "#define USERDATA" + itos(i + 1) + "_USED\n";
		}
		actions.renames["TRANSFORM"] = "xform";
		actions.renames["TIME"] = "time";
		actions.renames["PI"] = _MKSTR(Math_PI);