…atus (#11313)" (#11423)

This reverts commit 9ba2f9d.

It causes a channel panic due to unimplemented onResult2().

```
java.lang.UnsupportedOperationException: Not implemented.
        at io.grpc.NameResolver$Listener2.onResult2(NameResolver.java:257)
        at io.grpc.internal.DnsNameResolver$Resolve.lambda$run$0(DnsNameResolver.java:334)
        at io.grpc.SynchronizationContext.drain(SynchronizationContext.java:94)
        at io.grpc.SynchronizationContext.execute(SynchronizationContext.java:126)
	at io.grpc.internal.DnsNameResolver$Resolve.run(DnsNameResolver.java:333)
```

b/356669977

This reverts commit 0090a52 since 1.67.0-SNAPSHOT should not be referenced in the 1.66.x release.

Otherwise, the server will continue sending updates and if we
re-subscribe to the last resource, the server won't re-send it. Also
completely remove the per-type state, as it could only add confusion.

This reverts commit ccfd351.

Detachable lets a buffer outlive its original lifetime. The new lifetime
is application-controlled. If the application fails to read/close the
stream, then the leak detector wouldn't make clear what code was
responsible for the buffer's lifetime. With this touch, we'll be able to
see detach() was called and thus know the application needs debugging.

Realized when looking at b/364531464, although I think the issue is
unrelated.