migrate CiviCRM machines to gnt-dal

the crm-int-01 machine is having load/performance issues (e.g. https://gitlab.torproject.org/tpo/web/civicrm/-/issues/97 and others). let's see if we can alleviate that by moving it to the new gnt-dal cluster.

i believe that should also involve moving the crm-ext-01 machine, since it's closely related.

@lavamind do you think we have everything ready in Puppet to enable migrations between gnt-fsn and gnt-dal? would you be interested in performing such migration, to see if my documentation works okay?

ETA i gave @mathieu in the other ticket is "one-two weeks".