Clear the previously selected sign-in provider on failure

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

.changeset/twenty-pumpkins-work.md

@@ -0,0 +1,5 @@
+---
+'@backstage/core-components': patch
+---
+
+Clear the previously selected sign-in provider on failure

packages/core-components/src/layout/SignInPage/providers.tsx

@@ -143,6 +143,7 @@ export const useSignInProviders = (
         if (didCancel) {
           return;
         }
+        localStorage.removeItem(PROVIDER_STORAGE_KEY);
         errorApi.post(error);
         setLoading(false);
       });