ci: Make linux.*xlarge non-ephemeral (#70869)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70869
Makes linux runners non-ephemeral to reduce the amount of
CreateInstance calls that we have going towards AWS as well as to reduce
the amount of github API calls we make in order to create new instances.
Should help alleviate some of the queuing issues we may observe due to
AWS / Github rate limits
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Test Plan: Imported from OSS
Reviewed By: suo
Differential Revision: D33436874
Pulled By: seemethere
fbshipit-source-id: b2736fb4c9d175b1b0e2efb5017dcb4a8d4c05f4
