fix: add some missing workspace updates (#7790)

* Standardize on function to get workspace channel name

There were two, now there is one.

* Add some missing workspace updates

There are some failure cases where we do not set the type as a workspace
build which causes the workspace update to never be published.

* Make build failures warnings

Otherwise the associated test fails due to the logger fataling on
error messages.

coderd/coderdtest/coderdtest.go

@@ -643,10 +643,14 @@ func CreateWorkspaceBuild(
 	client *codersdk.Client,
 	workspace codersdk.Workspace,
 	transition database.WorkspaceTransition,
+	mutators ...func(*codersdk.CreateWorkspaceBuildRequest),
 ) codersdk.WorkspaceBuild {
 	req := codersdk.CreateWorkspaceBuildRequest{
 		Transition: codersdk.WorkspaceTransition(transition),
 	}
+	for _, mut := range mutators {
+		mut(&req)
+	}
 	build, err := client.CreateWorkspaceBuild(context.Background(), workspace.ID, req)
 	require.NoError(t, err)
 	return build