Support setting ImagePullPolicy in CheCluster

[amisevsk]

Is your enhancement related to a problem? Please describe

The DevWorkspace Operator allows configuring the image pull policy used for workspace containers through the DevWorkspaceOperatorConfig CR:

config:
  workspace:
    imagePullPolicy: <Always|IfNotPresent>

However, the only way to configure this for a Che installation is to either

• Edit the devworkspace-config DevWorkspaceOperatorConfig in the Che install namespace (used for all Che workspaces), or
• Create/edit the default DevWorkspaceOperatorConfig used by DWO globally.

Describe the solution you'd like

Che should expose (or reuse?) a field in the CheCluster that allows setting the image pull policy for workspace containers. This field should be propagated to the Che-owned DWOC in its install namespace

Describe alternatives you've considered

Manually editing the DevWorkspaceOperatorConfig created by Che works as well, but is hard to discover as a feature.

Additional context

Related: https://issues.redhat.com/browse/CRW-3357

[che-bot]

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[amisevsk]

/remove-lifecycle stale