Make factory functions CompositeExplicitAutograd (#82251)
This also makes them not decompose when we switch Python key.
Note that CompositeExplicitAutogradNonFunctional maybe be overly
conservative for some implementations (which actually call into
other functional ops), but for now I just uniformly apply this
everywhere to avoid errors.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/82251
Approved by: https://github.com/bdhirsh, https://github.com/zou3519
