Add the `maximize` flag to AdamW (#70146)
Summary:
Related issue: https://github.com/pytorch/pytorch/issues/68052
cc pietern mrshenli pritamdamania87 zhaojuanmao satgera rohan-varma gqchen aazzolini osalpekar jiayisuse SciPioneer H-Huang
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70146
Reviewed By: malfet
Differential Revision: D33254561
Pulled By: albanD
fbshipit-source-id: f190c836a4162f936c5953e076747c345df21421
