.github: Add linux.large instance type (#69165)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69165
We're hitting hard concurrency limits for built in github runners so
let's use our own runners and make them non-ephemeral so they'll have
basically constant uptime
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Test Plan: Imported from OSS
Reviewed By: atalman
Differential Revision: D32735494
Pulled By: seemethere
fbshipit-source-id: c042c6f0fb23fd50acef312d96b0c89d02c93270
