VERSION_ID in /etc/os-release is not mandatory
VERSION_ID in /etc/os-release is not mandatory

Summary:
e.g. debian doesn't seem to have it
```
$ cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux bullseye/sid"
NAME="Debian GNU/Linux"
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
```

Reviewed By: mjoras

Differential Revision: D20483097

fbshipit-source-id: 722397ff994336884ed2e5bbf8fe517d4dcf4e6c

facebook/wangle,facebook/wangle,facebook/wangle