Update SyncBatchNorm _all_gather_base to all_gather_into_tensor (#89521)
Summary: Fixes https://github.com/pytorch/pytorch/issues/88568
`_all_gather_base` is deprecated. So replacing its usage with `all_gather_into_tensor`
Test Plan: CI
Differential Revision: D41479983
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89521
Approved by: https://github.com/wz337
