chore: add echo helper to create an agent with token (#6576)

This should reduce some LOC and duplication in tests!

coderd/insights_test.go

@@ -15,7 +15,6 @@ import (
 	"github.com/coder/coder/codersdk"
 	"github.com/coder/coder/codersdk/agentsdk"
 	"github.com/coder/coder/provisioner/echo"
-	"github.com/coder/coder/provisionersdk/proto"
 	"github.com/coder/coder/testutil"
 )
 
@@ -31,24 +30,9 @@ func TestDeploymentInsights(t *testing.T) {
 	user := coderdtest.CreateFirstUser(t, client)
 	authToken := uuid.NewString()
 	version := coderdtest.CreateTemplateVersion(t, client, user.OrganizationID, &echo.Responses{
-		Parse:         echo.ParseComplete,
-		ProvisionPlan: echo.ProvisionComplete,
-		ProvisionApply: []*proto.Provision_Response{{
-			Type: &proto.Provision_Response_Complete{
-				Complete: &proto.Provision_Complete{
-					Resources: []*proto.Resource{{
-						Name: "example",
-						Type: "aws_instance",
-						Agents: []*proto.Agent{{
-							Id: uuid.NewString(),
-							Auth: &proto.Agent_Token{
-								Token: authToken,
-							},
-						}},
-					}},
-				},
-			},
-		}},
+		Parse:          echo.ParseComplete,
+		ProvisionPlan:  echo.ProvisionComplete,
+		ProvisionApply: echo.ProvisionApplyWithAgent(authToken),
 	})
 	template := coderdtest.CreateTemplate(t, client, user.OrganizationID, version.ID)
 	require.Empty(t, template.BuildTimeStats[codersdk.WorkspaceTransitionStart])