Add missing configuration options and fix ansible lint errors

[Lun4m]

Fixes:

• Add deploy role → moved to Add ansible files for deployment #33
• Add security group for Obsinn during configuration
• Add table partitions during configuration
• Fix postgres data directory (closes Make Postgres use the correct partition for data storage #36)
• Make style conform to ansible-lint
• Figure out how to deal with changed_when and ignore_errors
• Check if lard service should be stopped/restarted during switchover
• Add automatic teardown of instances and volumes
• Upgrade to postgres 17 and Ubuntu Noble

TODO (when Louise comes back):

• Add a way to handle ssh on teardown? (I don't remember what this means 🙈)
• Figure out why lard_ingestion can't connect to postgres on the standby node
  "failed to lookup address information: Temporary failure in name resolution"

Actually the problem is that we can't connect to stinfosys, because the standby is not routed through the
ipalias interface, therefore it drops most of the external connections.
Probably we want to have two floating IPs and switch them if the primary goes down.