[doc] Fix linalg.slogdet doc consistency issues (#51353)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/51353
Re-created from https://github.com/pytorch/pytorch/pull/51300 because of issues with ghstack.
This PR is part of a larger effort to ensure torch.linalg documentation is consistent (see https://github.com/pytorch/pytorch/issues/50287).
Updated torch.linalg.slogdet to include notes about cross-device synchronization, backend routines used and fix signature missing out argument.
Test Plan: Imported from OSS
Reviewed By: H-Huang
Differential Revision: D26148678
Pulled By: heitorschueroff
fbshipit-source-id: 40f6340226ecb72e4ec347c5606012f31f5877fb
