update poisson_nll_loss opinfo samples (#70300)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/67461
cc albanD mruberry jbschlosser walterddr kshitij12345
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70300
Reviewed By: cpuhrsch
Differential Revision: D33285896
Pulled By: jbschlosser
fbshipit-source-id: ec917ec7d3113dbc4ae03978fa5abb24aa082c01
