Prevent GraphArg from keeping real tensors live (#100515)
This may potentially fix an OOM on IG Cover model (Meta only: T152238176)
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/100515
Approved by: https://github.com/voznesenskym, https://github.com/yf225
