hack(smart-wallet): use heapVowE to unwrap vows

- smart wallet does not know the right thing to do when it receives a vow. happy paths may 'seem' ok since the offer result is Vow object. For failure paths, the smart wallet thinks a Vow object holding a Promise rejection is a successful offer result
- until #9308, this makes bootstrap tests pass

packages/smart-wallet/package.json

@@ -34,6 +34,7 @@
     "@agoric/store": "^0.9.2",
     "@agoric/vat-data": "^0.5.2",
     "@agoric/vats": "^0.15.1",
+    "@agoric/vow": "^0.1.0",
     "@agoric/zoe": "^0.26.2",
     "@endo/eventual-send": "^1.2.2",
     "@endo/far": "^1.1.2",

packages/smart-wallet/src/offerWatcher.js

@@ -9,6 +9,7 @@ import {
 } from '@agoric/zoe/src/typeGuards.js';
 import { AmountShape } from '@agoric/ertp/src/typeGuards.js';
 import { deeplyFulfilledObject, objectMap } from '@agoric/internal';
+import { heapVowE } from '@agoric/vow/vat.js';
 
 import { UNPUBLISHED_RESULT } from './offers.js';
 
@@ -37,7 +38,8 @@ import { UNPUBLISHED_RESULT } from './offers.js';
  * @param {UserSeat} seat
  */
 const watchForOfferResult = ({ resultWatcher }, seat) => {
-  const p = E(seat).getOfferResult();
+  // TODO NOT FOR PRODUCTION. See #9308
+  const p = heapVowE(seat).getOfferResult();
   watchPromise(p, resultWatcher, seat);
   return p;
 };