Make unary tests runnable if SCIPY is not installed (#59304)
Summary:
By adding `if TEST_SCIPY else _NOTHING` to special.i1 and special.i1e
Discovered while running tests on M1
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59304
Reviewed By: jbschlosser
Differential Revision: D28835693
Pulled By: malfet
fbshipit-source-id: e4fde6584da29fa43bc6da75eebe560512754ed0
