Topic admin operations doesn't work well for non-persistent partitioned topics

**Describe the bug**
See changes of `pulsar-broker/src/test/java/org/apache/pulsar/broker/admin/AdminApiTest.java` in https://github.com/apache/pulsar/pull/10601 for details.

1. `getList` would return 0 even if a partitioned topic was created
2. `deleteSubscription` may throw `NotFoundException`
3. `getSubscriptions` may return an empty list
4. the `subscriptions` field of what `getPartitionedStats` returns may contain nothing

**To Reproduce**
The `AdminApiTest` wouldn't pass if check for `isPersistent` was removed.

**Expected behavior**
After check for persistent domain was removed, `AdminApiTest` should pass.