xla

5f82da90 - [OpenXLA-pin-update trigger] Create _openxla_pin_update_weekly.yml (#7108)

[OpenXLA-pin-update trigger] Create _openxla_pin_update_weekly.yml (#7108) add trigger to create new OpenXLA-pin update PR automatically weekly, this is the first draft PR, and there maybe some follow-up change to update due the affect happen after PR merge