Chore: Add errutils helpers (#73577)

Add helpers for the errutil package in favor of errutil.NewBase.

pkg/util/errutil/errhttp/writer.go

@@ -11,7 +11,7 @@ import (
 	"github.com/grafana/grafana/pkg/util/errutil"
 )
 
-var ErrNonGrafanaError = errutil.NewBase(errutil.StatusInternal, "core.MalformedError")
+var ErrNonGrafanaError = errutil.Internal("core.MalformedError")
 var defaultLogger = log.New("requestErrors")
 
 // ErrorOptions is a container for functional options passed to [Write].

pkg/util/errutil/errhttp/writer_test.go

@@ -14,7 +14,7 @@ import (
 func TestWrite(t *testing.T) {
 	ctx := context.Background()
 	const msgID = "test.thisIsExpected"
-	base := errutil.NewBase(errutil.StatusTimeout, msgID)
+	base := errutil.Timeout(msgID)
 	handler := func(writer http.ResponseWriter, request *http.Request) {
 		Write(ctx, base.Errorf("got expected error"), writer)
 	}