[cuda] masked_scatter : static_cast init_value to circumvent cuda 11.2 issue (#51614)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/51544
Tested locally as there is no CI for 11.2 as of now.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/51614
Reviewed By: malfet
Differential Revision: D26253965
Pulled By: ngimel
fbshipit-source-id: 6d666a54871510ad0d00f915e45bbebcebc93015
