[inductor] Fix nan-handling of max and min reductions (#100572)
This adds helpers that replace tritons `minimum`, `maximum`, `min` and
`max` with the correct NaN prrpagation. I also removed
`ops.int_minimum` in favor of `ops.minimum` because we can just omit
the nan-checks by checking the dtype.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/100572
Approved by: https://github.com/ngimel
