Enable precreate subpaths property by default in templates

The property CHE_INFRA_KUBERNETES_PVC_PRECREATE__SUBPATHS is required
for PVC cleanup on current versions of Kubernetes/OpenShift.

Without the property enabled, subpaths are created in PVCs by Kubernetes
when they are needed for pods. However, only the leaf directory created
in this way has write permissions for nonroot users. As a result, the
cleanup pod cannot delete directories created (e.g. the
workspaceX/projects) directory.

For more details, see eclipse-che#12445

Signed-off-by: Angel Misevski <amisevsk@redhat.com>

deploy/kubernetes/helm/che/templates/configmap.yaml

@@ -53,7 +53,7 @@ data:
   CHE_INFRA_KUBERNETES_TRUST__CERTS: "false"
   CHE_INFRA_KUBERNETES_PVC_STRATEGY: "common"
   CHE_INFRA_KUBERNETES_PVC_QUANTITY: {{ .Values.global.pvcClaim }}
-  CHE_INFRA_KUBERNETES_PVC_PRECREATE__SUBPATHS: "false"
+  CHE_INFRA_KUBERNETES_PVC_PRECREATE__SUBPATHS: "true"
   CHE_INFRA_KUBERNETES_POD_SECURITY__CONTEXT_RUN__AS__USER: "0"
   CHE_INFRA_KUBERNETES_POD_SECURITY__CONTEXT_FS__GROUP: "0"
   CHE_LOCAL_CONF_DIR: /etc/conf

deploy/openshift/templates/che-server-template.yaml

@@ -300,7 +300,7 @@ parameters:
 - name: CHE_INFRA_KUBERNETES_PVC_PRECREATE__SUBPATHS
   displayName: Pre-create subpaths in PV
   description: Applied only if a common strategy is used. Required for Kubernetes versions before 1.6
-  value: 'false'
+  value: 'true'
 - name: CHE_OAUTH_GITHUB_CLIENTID
   displayName: GitHub Client ID
   description: GitHub oAuth app client ID. Applicable to Che single user only!