Fix NPE in Exchange CLI restore E2E setup suite (#4374)

#### Does this PR need a docs update or release note?

- [ ] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [x] ⛔ No

#### Type of change

- [ ] 🌻 Feature
- [x] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [x] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

#### Test Plan

- [x] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E

src/cli/restore/exchange_e2e_test.go

@@ -86,7 +86,7 @@ func (suite *RestoreExchangeE2ESuite) SetupSuite() {
 	)
 
 	// init the repo first
-	r, err := repository.New(
+	suite.repo, err = repository.New(
 		ctx,
 		suite.acct,
 		suite.st,
@@ -94,7 +94,7 @@ func (suite *RestoreExchangeE2ESuite) SetupSuite() {
 		repository.NewRepoID)
 	require.NoError(t, err, clues.ToCore(err))
 
-	err = r.Initialize(ctx, ctrlRepo.Retention{})
+	err = suite.repo.Initialize(ctx, ctrlRepo.Retention{})
 	require.NoError(t, err, clues.ToCore(err))
 
 	suite.backupOps = make(map[path.CategoryType]operations.BackupOperation)