feat: Instagram reauthorization (#11221)

This PR is part of https://github.com/chatwoot/chatwoot/pull/11054 to
make the review cycle easier.

app/javascript/shared/mixins/inboxMixin.js

@@ -121,6 +121,9 @@ export default {
         this.isATwilioWhatsAppChannel
       );
     },
+    isAInstagramChannel() {
+      return this.channelType === INBOX_TYPES.INSTAGRAM;
+    },
   },
   methods: {
     inboxHasFeature(feature) {