Change default pvcStrategy using chectl with operator

[Katka92]

Describe the bug

Che installed by chectl using the operator in default configuration uses pvcStrategy: common, but the PV has access mode set to ReadWriteOnce. This combination results in problems when multiple workspaces are started. It can happen that one workspace starts on one node, another workspace starts in another node - and then, because of ReadWriteOnce access, only the first one can access the PV. The solution could be to change the default pvcStrategy from common to per-workspace.

Che version

• latest
• nightly
• other: please specify

Steps to reproduce

1. Deploy Che by chectl using operator, e.g. chectl server:start -a operator -p openshift
2. Create two users
3. Start workspace with one user
4. Start workspace with the second user

Expected behavior

From time to time workspace starts, but usually, it fails with the message Multi-Attach error for volume <pvc> Volume is already used by pod(s) <pod_id>.

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (include output of minikube version and kubectl version)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• other: (please specify)

Installation method

• chectl
• che-operator
• minishift-addon
• I don't know

[tolusha]

Will be done as part of
#15684

[tolusha]

@Katka92
Pls check the description of PR.
che-incubator/chectl#508