Since #4910 stopped counting "stopping" workspaces for billing purposes,
any workspace caught in a "stopping" phase would never be force-stopped.
This adds a conditional "includeStopping" boolean (defaulting to `false`)
to the DB implementation and the meta-instance-controller simply includes
that phase in the search.
It was discovered that ~200 workspaces were caught in this phase (90%
prebuilds) so this phase is necessary to force-stop.
