internal/server: Log QMP interaction to a file #2905

Job	Run time
Client (oldstable, ubuntu-latest)	58s
Client (oldstable, macos-latest)	56s
Code (oldstable)	4m 20s
Documentation	5m 1s
Client (oldstable, windows-latest)	2m 54s
Code (stable)	4m 31s
Client (stable, ubuntu-latest)	1m 3s
System (stable, cluster, dir)	12m 32s
Code (tip)	7m 20s
Client (stable, macos-latest)	1m 1s
System (stable, cluster, btrfs)	12m 16s
Client (stable, windows-latest)	1m 26s
System (stable, cluster, lvm)	12m 45s
System (stable, cluster, zfs)	12m 35s
System (stable, cluster, ceph)	12m 46s
System (stable, cluster, random)	12m 47s
System (stable, standalone, dir)	12m 46s
System (stable, standalone, btrfs)	12m 46s
System (stable, standalone, lvm)	12m 45s
System (stable, standalone, zfs)	12m 46s
System (stable, standalone, ceph)	12m 46s
System (stable, standalone, random)	12m 46s
System (oldstable, cluster, dir)	12m 20s
System (oldstable, standalone, dir)	12m 45s
System (tip, cluster, dir)	12m 45s
System (tip, standalone, dir)	12m 45s
	3h 52m 21s

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