[iOS GPU][BE][4/n] - Convert Objective-C class methods to C functions (#53431)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53431
Objective-C’s dynamism comes at the cost of code size, perf and safety. In Facebook, we tend to not use Objective-C primitives or keep it to a minimum unless you need them.
ghstack-source-id: 123063340
Test Plan:
1. CircleCI
2. SandCastleCI
3. Mobilelab
Reviewed By: SS-JIA
Differential Revision: D26800753
fbshipit-source-id: b5a752a700d72ca3654f6826537aa3af47e87ecd
