c10/SymInt.h: Fix "integer conversion resulted in a change of sign" (#77398)
Summary:
By casting both operands to uint64_t as bitwise operations on signed types might be architecture dependent, but for x86_64 it doesn't matter:
https://godbolt.org/z/n81EncGz9
Test Plan: CI
Differential Revision: D36365405
Pull Request resolved: https://github.com/pytorch/pytorch/pull/77398
Approved by: https://github.com/Krovatkin
