Enable Zero1's ddp_with_overlap for hpu backend (#80438)
Enable zero with ddp overlap feature along with a simple interface to insert functional optimizer to the map
Signed-off-by: Jerome <janand@habana.ai>
Fixes #ISSUE_NUMBER
Pull Request resolved: https://github.com/pytorch/pytorch/pull/80438
Approved by: https://github.com/rohan-varma, https://github.com/awgu
