feat!: replace nfs-subdir-external-provisioner with csi-driver-nfs

[saschjmil]

Breaking Change

Replace the nfs-subdir-external-provisioner with the nfs.cs.k8s.io csi-driver-nfs. The nfs-subdir-external-provisioner is outdated, it is unmaintained and has known vulnerabilities.

Since this renames existing configuration variables, I am marking it as a breaking change.

Variable changes

Previous Name	New Name	New Default
NFS_CLIENT_NAMESPACE	CSI_DRIVER_NFS_NAMESPACE	kube-system
NFS_CLIENT_CHART_URL	CSI_DRIVER_NFS_CHART_URL	https://raw.githubusercontent.com/kubernetes-csi/csi-driver-nfs/master/charts
NFS_CLIENT_CHART_NAME	CSI_DRIVER_NFS_CHART_NAME	csi-driver-nfs
NFS_CLIENT_CHART_VERSION	CSI_DRIVER_NFS_CHART_VERSION	4.11.0
NFS_CLIENT_CONFIG	CSI_DRIVER_NFS_CONFIG	See here for the full list of changes
PG_NFS_CLIENT_NAMESPACE	CSI_DRIVER_NFS_PG_NAMESPACE	nfs-client
PG_NFS_CLIENT_CHART_URL	CSI_DRIVER_NFS_PG_CHART_URL	https://raw.githubusercontent.com/kubernetes-csi/csi-driver-nfs/master/charts
PG_NFS_CLIENT_CHART_NAME	CSI_DRIVER_NFS_PG_CHART_NAME	csi-driver-nfs
PG_NFS_CLIENT_CHART_VERSION	CSI_DRIVER_NFS_PG_CHART_VERSION	4.11.0
PG_NFS_CLIENT_CONFIG	CSI_DRIVER_NFS_PG_CONFIG	See here for the full list of changes

Tests

Scenario	DaC use method	Provider	Cadence	Storage Type	Postgres
1	Docker OOTB	AWS	stable:2025.03	NFS VM	Crunchy
2	Docker OOTB	AWS	stable:2025.04	EFS	Crunchy
3	Docker OOTB	AWS	stable:2025.04	ONTAP	Crunchy
4	Docker OOTB	AWS	stable:2025.04	NFS VM	External Postgres Database Server
-	-	-	-	-	-
5	Docker OOTB	Azure	stable:2025.04	NFS VM	Crunchy
6	Docker OOTB	Azure	stable:2025.04	NetApp	Crunchy
7	Docker OOTB	Azure	stable:2025.04	NFS VM	External Postgres Database Server
-	-	-	-	-	-
8	Docker OOTB	GCP	fast:2020	NFS VM	Crunchy
9	Docker OOTB	GCP	stable:2025.04	Google Filestore	Crunchy
10	Docker OOTB	GCP	stable:2025.04	NetApp	Crunchy
11	Docker OOTB	GCP	stable:2025.04	NFS VM	External Postgres Database Server