[nnc] Updated indices during broadcast to use int64_t (#64627)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64627
This fixes the root cause of S242719
Test Plan: Imported from OSS
Reviewed By: ZolotukhinM
Differential Revision: D30801686
Pulled By: navahgar
fbshipit-source-id: b6d3ebdc7eb57116eaced53c2f35c7798bb17e80
