[UD] preferred_type is not respected by dashboard

[sleshchenko]

Describe the bug

[UD] preferred_type is not respected by dashboad

Che version

• latest
• nightly
• other: please specify

Steps to reproduce

1. Deploy che with non-default storage type as preferred:

chectl server:deploy --installer=operator --platform=openshift --che-operator-cr-patch-yaml=/home/sleshche/che-custom-che-server.yaml
spec:
  server:
    cheImagePullPolicy: Always
    customCheProperties:
      CHE_WORKSPACE_STORAGE_AVAILABLE__TYPES: persistent,ephemeral,async
      CHE_WORKSPACE_STORAGE_PREFERRED__TYPE: ephemeral

2. Check that it's used on Get Started
   

3. Check that it's used on Create Custom Workspace
   

4. Create that it's used on Factory flow
   

[sleshchenko]

Get started page will be fixed in 7.28.
Not timeline for other cases yet

[sleshchenko]

tested and after eclipse-che/che-dashboard#187 all of the described scenarios work as expected - preferable type is applied:

• for factory flow - only when devfile does not have specified storage attributes
• for create custom workspace(templates + load devfile) - always, storage attributes are always overridden. A dedicated issue will be created to make custom workspace page respect devfile storage attributes, and apply default only when they are missing.