migration-test is unreliable
Description of problem
The following intermittent failure occurred in the CI:
>>> QTEST_QEMU_IMG=./qemu-img MALLOC_PERTURB_=116 QTEST_QEMU_STORAGE_DAEMON_BINARY=./storage-daemon/qemu-storage-daemon G_TEST_DBUS_DAEMON=/builds/qemu-project/qemu/tests/dbus-vmstate-daemon.sh QTEST_QEMU_BINARY=./qemu-system-x86_64 /builds/qemu-project/qemu/build/tests/qtest/migration-test --tap -k
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stderr:
qemu-system-x86_64: Unable to read from socket: Connection reset by peer
Memory content inconsistency at 5b43000 first_byte = bd last_byte = bc current = 4f hit_edge = 1
**
ERROR:../tests/qtest/migration-test.c:300:check_guests_ram: assertion failed: (bad == 0)
(test program exited with status code -6)
You can find the full output here: https://gitlab.com/qemu-project/qemu/-/jobs/5080200417