[meta][easy] fix multiple ops `out=` dtype promotion (#193555)

Follows: #138399

Fixes the following operators:
- conj_physical
- frexp
- index_add
- index_copy
- index_select
- nan_to_num
- tril
- triu
Pull Request resolved: https://github.com/pytorch/pytorch/pull/193555
Approved by: https://github.com/Skylion007