refactor move state.State.Workflow into own type (#6338)

pipeline/runtime/runtime_test.go

@@ -204,10 +204,7 @@ func TestWorkflowWithServiceStep(t *testing.T) {
 
 		assert.Greater(t, traces[4].Workflow.Started, int64(0))
 		assert.EqualValues(t, state.State{
-			Workflow: struct {
-				Started int64 `json:"time"`
-				Error   error `json:"error"`
-			}{
+			Workflow: state.Workflow{
 				Started: traces[4].Workflow.Started,
 			},
 			CurrStep: &backend.Step{

pipeline/state/state.go

@@ -23,14 +23,16 @@ import (
 // And the workflow is updated alongside it.
 type State struct {
 	// Global state of the currently running Workflow.
-	Workflow struct {
-		// Workflow start time
-		Started int64 `json:"time"`
-		// Current workflow error state
-		Error error `json:"error"`
-	}
+	Workflow Workflow
 	// Current step that updates the step and workflow state
 	CurrStep *backend.Step `json:"step"`
 	// Current step state
 	CurrStepState backend.State
 }
+
+type Workflow struct {
+	// Workflow start time
+	Started int64 `json:"time"`
+	// Current workflow error state
+	Error error `json:"error"`
+}