[web] In `_deleteV1Account`: Add `response?.statusCode` optional chaining, await request before getting response (#19936)

* Add optional chaining in `response.statusCode` in `_deleteV1Account` error handling

Should fix https://overleaf.sentry.io/issues/5708988236/

* Add another `response?.statusCode`

* Await `V1Api.promises.request` before getting the response

GitOrigin-RevId: 52a156680845516357b11943bee8c33a5a023514

services/web/app/src/Features/V1/V1Api.js

@@ -71,17 +71,17 @@ const V1Api = {
       )
     }
     if (
-      (response.statusCode >= 200 && response.statusCode < 300) ||
+      (response && response.statusCode >= 200 && response.statusCode < 300) ||
       Array.from(options.expectedStatusCodes || []).includes(
-        response.statusCode
+        response?.statusCode
       )
     ) {
       return callback(null, response, body)
-    } else if (response.statusCode === 403) {
+    } else if (response?.statusCode === 403) {
       error = new Errors.ForbiddenError('overleaf v1 returned forbidden')
       error.statusCode = response.statusCode
       return callback(error)
-    } else if (response.statusCode === 404) {
+    } else if (response?.statusCode === 404) {
       error = new Errors.NotFoundError(
         `overleaf v1 returned non-success code: ${response.statusCode} ${options.method} ${options.uri}`
       )
@@ -89,9 +89,9 @@ const V1Api = {
       return callback(error)
     } else {
       error = new Error(
-        `overleaf v1 returned non-success code: ${response.statusCode} ${options.method} ${options.uri}`
+        `overleaf v1 returned non-success code: ${response?.statusCode} ${options.method} ${options.uri}`
       )
-      error.statusCode = response.statusCode
+      error.statusCode = response?.statusCode
       return callback(error)
     }
   },