feat: rename addon vars to addon_ prefix and simplify logic in jinja templates (#1216)

Signed-off-by: Devin Buhl <devin@buhl.casa>

bootstrap/templates/kubernetes/apps/storage/csi-driver-nfs/app/helmrelease.yaml.j2

@@ -1,4 +1,4 @@
-#% if csi_driver_nfs|default({}) and csi_driver_nfs.enabled|default(false) %#
+#% if addon_csi_driver_nfs.enabled %#
 ---
 apiVersion: helm.toolkit.fluxcd.io/v2beta2
 kind: HelmRelease

bootstrap/templates/kubernetes/apps/storage/csi-driver-nfs/app/kustomization.yaml.j2

@@ -1,4 +1,4 @@
-#% if csi_driver_nfs|default({}) and csi_driver_nfs.enabled|default(false) %#
+#% if addon_csi_driver_nfs.enabled %#
 ---
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization

bootstrap/templates/kubernetes/apps/storage/csi-driver-nfs/app/storageclass.yaml.j2

@@ -1,5 +1,5 @@
-#% if csi_driver_nfs|default({}) and csi_driver_nfs.enabled|default(false) %#
-#% for item in csi_driver_nfs.storage_class %#
+#% if addon_csi_driver_nfs.enabled %#
+#% for item in addon_csi_driver_nfs.storage_class %#
 ---
 apiVersion: storage.k8s.io/v1
 kind: StorageClass

bootstrap/templates/kubernetes/apps/storage/csi-driver-nfs/ks.yaml.j2

@@ -1,4 +1,4 @@
-#% if csi_driver_nfs|default({}) and csi_driver_nfs.enabled|default(false) %#
+#% if addon_csi_driver_nfs.enabled %#
 ---
 apiVersion: kustomize.toolkit.fluxcd.io/v1
 kind: Kustomization