replaced whitelist with allowlist (#45260)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/41754
**(1)**
Intially file was named **gen_op_registration_whitelist.py** I changed it to **gen_op_registration_allowlist.py**
**(2)**
There were some **whitelist** in comment inside the file, I changed it to **allowlist**
Pull Request resolved: https://github.com/pytorch/pytorch/pull/45260
Reviewed By: dhruvbird
Differential Revision: D23947182
Pulled By: ljk53
fbshipit-source-id: 31b486592451dbb0605d7950e07747cbb72ab80f
