Reduce fake_tensor create_mode logging (#101074)
A lot of Meta-internal logging is at INFO level, so this produces a lot of spam
Differential Revision: [D45732720](https://our.internmc.facebook.com/intern/diff/D45732720/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/101074
Approved by: https://github.com/eellison, https://github.com/ezyang
