[ttk] Store float64 in tensorboard instead of float32 (#59435)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59435
Sometimes we need to compare 10+ digits. Currenlty tensorboard only saves float32. Provide an option to save float64
Reviewed By: yuguo68
Differential Revision: D28856352
fbshipit-source-id: 05d12e6f79b6237b3497b376d6665c9c38e03cf7
