[Codegen] Remove view operator check in NativeFunctionGroups and allow skipping native function generation (#78145)
Summary:
This PR adds two features:
* A boolean to turn off native function generation in codegen
* Relaxing `view` operator check for `NativeFunctionGroups`
Differential Revision: D36604646
Pull Request resolved: https://github.com/pytorch/pytorch/pull/78145
Approved by: https://github.com/iseeyuan, https://github.com/bdhirsh
