TPA-RFC-52: mass VM migration from gnt-chi to gnt-dal

as per TPA-RFC-43, once we have contact at the new colo (#40967 (closed)), the servers are ordered and shipped (#40966 (closed)), burnt-in (#40969 (closed)), installed #40970 (closed), and configured with ganeti #40971 (closed), we need to migrate the entire gnt-chi cluster to it.

the plan is, roughly:

• announce VM migration plan, see https://gitlab.torproject.org/tpo/tpa/team/-/wikis/policy/tpa-rfc-52-cymru-migration-timeline
• mass VM migration setup (the move-instance command), just missing patch deployment, probably debian packages
• mass migration and renumbering, hopefully Monday 2023-03-20

VMs to migrate:

• btcpayserver-02
• ci-runner-x86-01, @lavamind has the idea of rebuilding the VM, but it was migrated to speed up the gnt-chi retirement and close this ticket.
• dangerzone-01
• gitlab-dev-01
• metrics-psqlts-01
• onionbalance-02
• probetelemetry-01
• rdsys-frontend-01
• static-gitlab-shim
• survey-01
• tb-pkgstage-01
• tb-tester-01
• telegram-bot-01
• test-01
• tpa-bootstrap-01

once this is done, the gnt-chi cluster can be (almost) entirely retired, see #40973 (closed) and #40968 (closed).