Add field to DevWorkspace to allow overriding Pod spec (devfile#860)

Add field `pods` to the DevWorkspace spec (but not Devfile or
DevWorkspaceTemplate) that allows specifying arbitrary fields on any
pods created for the DevWorkspace.

Signed-off-by: Angel Misevski <[email protected]>

Author: amisevsk

Diff for: pkg/apis/workspaces/v1alpha2/devworkspace_types.go

@@ -10,6 +10,11 @@ type DevWorkspaceSpec struct {
 	Started      bool                     `json:"started"`
 	RoutingClass string                   `json:"routingClass,omitempty"`
 	Template     DevWorkspaceTemplateSpec `json:"template,omitempty"`
+	// PodSpecOverrides defines Pod fields to override within the DevWorkspace's
+	// Deployment. Fields defined here are strategically merged on top of the Pod
+	// template in the deployment, allowing for fine-grained customization of the
+	// Pods that are started for this DevWorkspace.
+	PodSpecOverrides *corev1.PodSpec `json:"pods,omitempty"`
 }
 
 // DevWorkspaceStatus defines the observed state of DevWorkspace