Test suite hangs on FreeBSD 13.2
Description of problem:
The 80 minute timeout for the x64-freebsd-13-build CI job is insufficient:
https://gitlab.com/qemu-project/qemu/-/jobs/5058610599

```
672/832 qemu:block / io-qcow2-041              OK             39.77s   1 subtests passed
Timed out!
```