Add ignore for -Wunsupported-availability-guard
This failed internal builds so just upstreaming the internal fix
Signed-off-by: Eli Uriegas <eliuriegasfb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/77995
Approved by: https://github.com/bigfootjon, https://github.com/malfet
(cherry picked from commit a9a99a901e953cf35edd010e17ee0ed4d2f347af)
