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, true, Image::FORMAT_RGBA8);
			image->fill(Color(0.5, 0.5, 1, 1));
			image->generate_mipmaps();
			default_gl_textures[DEFAULT_GL_TEXTURE_NORMAL] = texture_allocate();
			texture_2d_initialize(default_gl_textures[DEFAULT_GL_TEXTURE_NORMAL], image);
		}
		{
			Ref<Image> image = Image::create_empty(4, 4, true, Image::FORMAT_RGBA8);
			image->fill(Color(1.0, 0.5, 1, 1));
			image->generate_mipmaps();
			default_gl_textures[DEFAULT_GL_TEXTURE_ANISO] = texture_allocate();
			texture_2d_initialize(default_gl_textures[DEFAULT_GL_TEXTURE_ANISO], image);
		}
		{
			unsigned char pixel_data[4 * 4 * 4];
			for (int i = 0; i < 16; i++) {
				pixel_data[i * 4 + 0] = 0;
				pixel_data[i * 4 + 1] = 0;
				pixel_data[i * 4 + 2] = 0;
				pixel_data[i * 4 + 3] = 0;
			}
			default_gl_textures[DEFAULT_GL_TEXTURE_2D_UINT] = texture_allocate();
			Texture texture;
			texture.width = 4;
			texture.height = 4;
			texture.format = Image::FORMAT_RGBA8;
			texture.type = Texture::TYPE_2D;
			texture.target = GL_TEXTURE_2D;
			texture.active = true;