Regression from #71248:

I believe this pull may have caused errors on WebGL since it moves the `GLES_OVER_GL` guard. WebGL does not support texture swizzling per: https://registry.khronos.org/webgl/specs/latest/2.0/#5.19
so this is causing the following trace in Chrome:
```
WebGL: INVALID_ENUM: texParameter: invalid parameter name
```
and it quickly fills up the 256 log limit for the same message in WebGL.

This doesn't appear to be breaking anything asides from causing the numerous log messages.

_Originally posted by @jnlopar in https://github.com/godotengine/godot/issues/71248#issuecomment-1384768973_

CC @rsjtdrjgfuzkfg @clayjohn
Ref<Image> image = Image::create_empty(4, 4, false, Image::FORMAT_RGBA8);
	image->fill(Color(1, 0, 1, 1));
	Vector<Ref<Image>> images;
	if (p_layered_type == RS::TEXTURE_LAYERED_2D_ARRAY) {
		images.push_back(image);
	} else {
		
		for (int i = 0; i < 6; i++) {
			images.push_back(image);
		}
	}
	texture_2d_layered_initialize(p_texture, images, p_layered_type);
}
void TextureStorage::texture_3d_placeholder_initialize(RID p_texture) {
	
	
	Ref<Image> image = Image::create_empty(4, 4, false, Image::FORMAT_RGBA8);
	image->fill(Color(1, 0, 1, 1));
	Vector<Ref<Image>> images;
	
	for (int i = 0; i < 4; i++) {
		images.push_back(image);
	}
	texture_3d_initialize(p_texture, Image::FORMAT_RGBA8, 4, 4, 4, false, images);
}
Ref<Image> TextureStorage::texture_2d_get(RID p_texture) const {