fix: test: Fix cyclic glues (again)

Previous fix `ed90d578b3a98f45eb8bc09966e9c4ab870a156d` uses
`wait_for_line()` by mistake, and the test aims to wait for two log
lines to be printed before continuing.

In principle, `wait_for_all()` should do, but `running` should always be
printed first, so `wait_for_sequence()` seems to be the right fit here.

Merge branch 'colin/fix-cyclic-glues-again' into 'main'

See merge request isc-projects/bind9!12013