fix: test: Fix cyclic_glue system test

The cyclic_glue system test was waiting for `running` log after
an `rndc reload` command, but wasn't waiting for the log saying a
specific zone which changed has been reloaded `zone <zone>/IN: loaded`.

As a result, the test could randomly fails. This is now fixed.

Closes #5953

Merge branch '5953-fix-cyclic-glue-test' into 'main'

See merge request isc-projects/bind9!12003