Add explicit OperatorHandle destructor (#70033)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/70032
Windows build of PyTorch doesn't produce the `c10::OperatorHandle::~OperatorHandle(void)` symbol in any of its `*.lib` files. This fix is to explicitly define it in Dispatcher.cpp, so downstream consumers wanting to dllimport can find it.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70033
Reviewed By: jbschlosser
Differential Revision: D33240599
Pulled By: bdhirsh
fbshipit-source-id: 56cc5963043bd5caac30e42c3501a4f48d086b36
