Stop setting the StreamOptimized option in Weldr and Cloud APIs

The VMDK image is already produced as stream-optimized. Therefore stop
setting the `StreamOptimized` option in `OSBuildJob` structure by both,
Weldr and Cloud APIs.

Keep the handling of the option in worker for backward compatibility,
in case an older instance of Composer server is used, which does not
produce VMDK manifests as stream-optimized. In such case, the worker
needs to convert the image.

internal/cloudapi/v2/server.go

@@ -102,9 +102,8 @@ func (s *Server) enqueueCompose(distribution distro.Distro, bp blueprint.Bluepri
 	}
 
 	id, err = s.workers.EnqueueOSBuildAsDependency(ir.arch.Name(), &worker.OSBuildJob{
-		Targets:         []*target.Target{ir.target},
-		Exports:         ir.imageType.Exports(),
-		StreamOptimized: ir.imageType.Name() == "vmdk", // https://github.com/osbuild/osbuild/issues/528,
+		Targets: []*target.Target{ir.target},
+		Exports: ir.imageType.Exports(),
 		PipelineNames: &worker.PipelineNames{
 			Build:   ir.imageType.BuildPipelines(),
 			Payload: ir.imageType.PayloadPipelines(),

internal/weldr/api.go

@@ -2347,11 +2347,10 @@ func (api *API) composeHandler(writer http.ResponseWriter, request *http.Request
 		var jobId uuid.UUID
 
 		jobId, err = api.workers.EnqueueOSBuild(api.archName, &worker.OSBuildJob{
-			Manifest:        manifest,
-			Targets:         targets,
-			ImageName:       imageType.Filename(),
-			StreamOptimized: imageType.Name() == "vmdk", // https://github.com/osbuild/osbuild/issues/528
-			Exports:         imageType.Exports(),
+			Manifest:  manifest,
+			Targets:   targets,
+			ImageName: imageType.Filename(),
+			Exports:   imageType.Exports(),
 			PipelineNames: &worker.PipelineNames{
 				Build:   imageType.BuildPipelines(),
 				Payload: imageType.PayloadPipelines(),

internal/worker/json.go

@@ -15,12 +15,15 @@ import (
 //
 
 type OSBuildJob struct {
-	Manifest        distro.Manifest  `json:"manifest,omitempty"`
-	Targets         []*target.Target `json:"targets,omitempty"`
-	ImageName       string           `json:"image_name,omitempty"`
-	StreamOptimized bool             `json:"stream_optimized,omitempty"`
-	Exports         []string         `json:"export_stages,omitempty"`
-	PipelineNames   *PipelineNames   `json:"pipeline_names,omitempty"`
+	Manifest  distro.Manifest  `json:"manifest,omitempty"`
+	Targets   []*target.Target `json:"targets,omitempty"`
+	ImageName string           `json:"image_name,omitempty"`
+
+	// TODO: Delete this after "some" time (kept for backward compatibility)
+	StreamOptimized bool `json:"stream_optimized,omitempty"`
+
+	Exports       []string       `json:"export_stages,omitempty"`
+	PipelineNames *PipelineNames `json:"pipeline_names,omitempty"`
 }
 
 type JobResult struct {