Skip un-runnable tests (#31965)
Summary:
`test_init_ops` calls `orthogonal_` which fails without lapack (this test was just missing a skip condition)
The cpp tests would fail with a `undefined symbol` error if run with `BUILD_TESTS=0`, so this PR skips them if that flag is `0`
](https://our.intern.facebook.com/intern/diff/19320064/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/31965
Pulled By: driazati
Differential Revision: D19320064
fbshipit-source-id: d1dcd36714107688ded25a414e8969abe026bd03
