Provide (but skip) 3.5 job by default on all PRs. (#27293)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/27293
This doesn't turn on 3.5 signal, but it makes it so that [test all]
will include it if you do request it.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Differential Revision: D17738741
Pulled By: ezyang
fbshipit-source-id: 2b1af4d7bf26fd84a593fde292d6bfa2aabc1148
