Error deallocating textures used for render targets

[patrickdown]

These errors are listed when the app using the extension closes. The renderer marks the created textures as render targets. Because of this they can't be deallocated as normal so they leak when the app exits.

ERROR: Condition "t->is_render_target" is true.
   at: GLES3::TextureStorage::texture_free (drivers\gles3\storage\texture_storage.cpp:706)
ERROR: 1 RID allocations of type 'struct GLES3::Texture' were leaked at exit.
ERROR: Texture Layered: 82: leaked 9961416 bytes.
   at: GLES3::Utilities::~Utilities (drivers\gles3\storage\utilities.cpp:75)

[patrickdown]

This is probably going to need to be fixed on the Godot side.

[patrickdown]

I'm not terribly worried about this one since it's a leak on exit.