PredefinedNamespace test should use the latest Dev Spaces VS Code Editor image

Solution

Update the test to override the che-code-injector container image after the devfile context is generated. The image is now set to the Dev Spaces VS Code Editor:
quay.io/redhat-user-workloads/devspaces-tenant/devspaces/code-rhel9:latest
 
Changes

• After generateDevfileContext() is called, iterate through devWorkspaceTemplates and update the che-code-injector component image to use the Dev Spaces editor image
• This ensures the workspace uses the correct editor image for Dev Spaces environments