nvfx: new 2D: new render temporaries with resources

nvfx: new 2D: new render temporaries with resources

This patch adds support for creating temporary surfaces to allow
rendering to surfaces that cannot be rendered to.
It uses the _second_ version of the render temporary infrastructure.

This is necessary for swizzled 3D textures and small mipmaps of
swizzled 2D textures.

This version of the patch creates a resource to use as a temporary
instead of a raw BO, making the code simpler.