feat(publick8s) add a persistent volume for maxmind/geoip

[dduportal]

Ref. jenkins-infra/helpdesk#4240

This PR adds a new PVC statically provisioned based on an Azurefile to ensure a ReadyMany* access mode.
The goal is to have a centralized data dir. for the GeoIP database.

• Using a storage account reusable for the whole cluster, hence the naming. Type is Storage v2: means billing per request: only define file shares with low workload!

[dduportal]

• Checks: Plan: 6 to add, 0 to change, 0 to destroy.
• Tested manually (and then cleaned up)

=> only unknown is the main branch in infra.ci (terraform Azure SP)