### 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
} else {
		state.transparent_render_target = false;
		glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ZERO, GL_ONE);
	}
	if (render_target && render_target->clear_requested) {
		const Color &col = render_target->clear_color;
		glClearColor(col.r, col.g, col.b, col.a);
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
		render_target->clear_requested = false;
	}
	glActiveTexture(GL_TEXTURE0);
	GLES3::Texture *tex = texture_storage->get_texture(texture_storage->texture_gl_get_default(GLES3::DEFAULT_GL_TEXTURE_WHITE));
	glBindTexture(GL_TEXTURE_2D, tex->tex_id);
}
void RasterizerCanvasGLES3::_bind_canvas_texture(RID p_texture, RS::CanvasItemTextureFilter p_base_filter, RS::CanvasItemTextureRepeat p_base_repeat) {
	GLES3::TextureStorage *texture_storage = GLES3::TextureStorage::get_singleton();
	GLES3::Config *config = GLES3::Config::get_singleton();
	if (p_texture == RID()) {
		p_texture = default_canvas_texture;
	}
	if (state.current_tex == p_texture && state.current_filter_mode == p_base_filter && state.current_repeat_mode == p_base_repeat) {
		return;
	}
	state.current_tex = p_texture;
	state.current_filter_mode = p_base_filter;
	state.current_repeat_mode = p_base_repeat;
	GLES3::CanvasTexture *ct = nullptr;
	GLES3::Texture *t = texture_storage->get_texture(p_texture);
	if (t) {
		ERR_FAIL_COND(!t->canvas_texture);