Delete details snapshot (#3914)

Check for a populated StreamStoreID and fallback to the DetailsID if necessary.

---

#### 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
- [ ] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

#### Issue(s)

* closes #3913

#### Test Plan

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

src/pkg/repository/repository.go

@@ -616,8 +616,13 @@ func deleteBackup(
 		}
 	}
 
-	if len(b.DetailsID) > 0 {
-		if err := kw.DeleteSnapshot(ctx, b.DetailsID); err != nil {
+	ssid := b.StreamStoreID
+	if len(ssid) == 0 {
+		ssid = b.DetailsID
+	}
+
+	if len(ssid) > 0 {
+		if err := kw.DeleteSnapshot(ctx, ssid); err != nil {
 			return err
 		}
 	}