Add error options for rendering to return errors on failure (#48864)

pkg/services/rendering/interface.go

@@ -41,6 +41,7 @@ func getRequestTimeout(opt TimeoutOpts) time.Duration {
 type Opts struct {
 	TimeoutOpts
 	AuthOpts
+	ErrorOpts
 	Width             int
 	Height            int
 	Path              string
@@ -52,6 +53,15 @@ type Opts struct {
 	Theme             models.Theme
 }
 
+type ErrorOpts struct {
+	// ErrorConcurrentLimitReached returns an ErrConcurrentLimitReached
+	// error instead of a rendering limit exceeded image.
+	ErrorConcurrentLimitReached bool
+	// ErrorRenderUnavailable returns an ErrRunderUnavailable error
+	// instead of a rendering unavailable image.
+	ErrorRenderUnavailable bool
+}
+
 type CSVOpts struct {
 	TimeoutOpts
 	AuthOpts