Yossi Gottlieb 5ddc0af33e
Update old Debian CI. (#12104)
We were using `oldstable` Debian as a CI with an older toolchain, but that image is now offline so move to debian:buster

```
E: Failed to fetch http://security.debian.org/debian-security/dists/oldoldstable/updates/main/binary-amd64/Packages 404 Not Found [IP: 151.101.2.132 80]
```
2023-04-25 14:09:37 +03:00
..
2023-04-25 14:09:37 +03:00