chore: Show error message if the AI process APIs fails (#7560)

Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>

app/javascript/dashboard/i18n/locale/en/integrations.json

@@ -121,7 +121,7 @@
         "GENERATING": "Generating...",
         "CANCEL": "Cancel"
       },
-      "GENERATE_ERROR": "There was an error processing the content, please try again"
+      "GENERATE_ERROR": "There was an error processing the content, please verify your OpenAI API key and try again"
     },
     "DELETE": {
       "BUTTON_TEXT": "Delete",

app/javascript/dashboard/mixins/aiMixin.js

@@ -1,8 +1,10 @@
 import { mapGetters } from 'vuex';
 import { OPEN_AI_EVENTS } from '../helper/AnalyticsHelper/events';
 import OpenAPI from '../api/integrations/openapi';
+import alertMixin from 'shared/mixins/alertMixin';
 
 export default {
+  mixins: [alertMixin],
   mounted() {
     this.fetchIntegrationsIfRequired();
   },