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!

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