Remove early return from error announcement logic (#3663)

Author: jonrohan

.changeset/seven-peaches-serve.md

@@ -0,0 +1,5 @@
+---
+"@primer/view-components": patch
+---
+
+When an error occurs in the SelectPanel, continue throwing the error

app/components/primer/alpha/select_panel_element.ts

@@ -554,10 +554,8 @@ export class SelectPanelElement extends HTMLElement {
         // check if the errorElement is visible in the dom
         if (errorElement && !errorElement.hasAttribute('hidden')) {
           this.liveRegion.announceFromElement(errorElement, {politeness: 'assertive'})
-          return
         }
-
-        break
+        throw new Error((event as CustomEvent).detail.error)
       }
     }
   }