Allow SymInt to specialize to FLOAT (#111219)
Fixes https://github.com/pytorch/pytorch/issues/111200
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/111219
Approved by: https://github.com/Skylion007, https://github.com/bdhirsh
ghstack dependencies: #111216
