Add mapping for unsqueeze_n_times (#75043)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/75043
Reviewed By: RoshanPAN, garroud
Differential Revision: D35293706
fbshipit-source-id: 2fe1f6ee54376ef9796ae66cb4d31533ea92bb42
(cherry picked from commit bf3c02f760ffda0d648d4e95ef2e0e381af4cdaa)
