### Godot version

4.1.1.stable, 4.2.dev (2282fc5de)

### System information

Arch Linux - X11 - GLES3 (Compatibility) - NVIDIA GeForce RTX 3060 Ti (nvidia; 535.104.05) - 13th Gen Intel(R) Core(TM) i5-13400F (16 Threads)

### Issue description

When using Compatibility renderer, adjusting the Alpha component of clear color affects 2D editor content.

This does not happen when using Forward+ or Mobile renderer. Does not affect 3D editor and the running game.


https://github.com/godotengine/godot/assets/372476/e398522e-590a-4832-959f-ea8ba8e71c5d



### Steps to reproduce

1. Create a project using Compatibility renderer.
2. Adjust the clear color's alpha component in Project Settings.

### Minimal reproduction project

N/A
OccluderPolygon *oc = occluder_polygon_owner.get_or_null(p_occluder);
	ERR_FAIL_COND(!oc);
	oc->cull_mode = p_mode;
}
void RasterizerCanvasGLES3::set_shadow_texture_size(int p_size) {
	GLES3::Config *config = GLES3::Config::get_singleton();
	p_size = nearest_power_of_2_templated(p_size);
	if (p_size > config->max_texture_size) {
		p_size = config->max_texture_size;
		WARN_PRINT("Attempting to set CanvasItem shadow atlas size to " + itos(p_size) + " which is beyond limit of " + itos(config->max_texture_size) + "supported by hardware.");
	}
	if (p_size == state.shadow_texture_size) {
		return;
	}
	state.shadow_texture_size = p_size;
	if (state.shadow_fb != 0) {
		glDeleteFramebuffers(1, &state.shadow_fb);
		GLES3::Utilities::get_singleton()->texture_free_data(state.shadow_texture);
		glDeleteRenderbuffers(1, &state.shadow_depth_buffer);
		state.shadow_fb = 0;
		state.shadow_texture = 0;
		state.shadow_depth_buffer = 0;
	}
	_update_shadow_atlas();
}
bool RasterizerCanvasGLES3::free(RID p_rid) {