This test fails constantly now on vtest arm / Freebsd 13.0 for timeout.

As vcl compilations are probably the most expensive operations of vtcs,
we speed up this test by reducing the number of vcls loaded from 19 to
11. We do this by collapsing all of the client side failure tests into a
single vcl. Being at it, we also reduce logexpect synchronization points.

The number of vcl loads could be reduced further by also collapsing the
backend side, but as this would reduce clarity more than for the client
side alone, I first wanted to see if this first step brings down tuntime
enough.