Parameterize TestGenericProxyTensor on tracing_mode (#82746)
This gives us tests for fake (all passing) and symbolic (not all passing).
I needed to add a gadget for xfail'ing tests in symbolic. It might be
generally useful, let me know what you think.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/82746
Approved by: https://github.com/eellison
