test: Clear notifications after saving credentials in e2e tests

Often the "Credential saved" notification is left floating over other elements
that prevent the test from continuing until the notification goes away. This
should speed up the e2e tests a tiny wee bit.

cypress/composables/modals/credential-modal.ts

@@ -2,6 +2,8 @@
  * Getters
  */
 
+import { clearNotifications } from '../../pages/notifications';
+
 export function getCredentialConnectionParameterInputs() {
 	return cy.getByTestId('credential-connection-parameter');
 }
@@ -55,5 +57,6 @@ export function setCredentialValues(values: Record<string, string>, save = true)
 	if (save) {
 		saveCredential();
 		closeCredentialModal();
+		clearNotifications();
 	}
 }