[roll] Roll fuchsia [kernel][thread] Move owned_wait_queues_ out of wait_queue_state_

In preperation for applying more formal lock annotations to some of
the fields protected by more complex locking protocols, move the
`owned_wait_queues_` collection out of `Thread::wait_queue_state_`,
and into the top level of Thread itself.

`owned_wait_queues_` is the collection of OWQs currently owned by a
thread, while the `owner_` member of an owned wait queue is the
forward link from the queue to the thread.  Just like other container
relationships between threads, wait queues, and schedulers, this one
requires a slightly special multi-lock protocol.

In specific, threads are free to read over their collection of queues
provided that they hold their lock.  Likewise, queues are allowed to
read their owner provided that they hold their own lock. Neither one
is allowed to add or remove an edge between the two, however, unless
they hold _both_ locks.

The `wait_queue_state_` members of a thread are similar in nature, but
with the roles of container and object reversed; the thread is the
object contained in the queue instead of the other way around.

So the members of `wait_queue_state_` are protected by the protocol
which protects the relationship between threads blocked by queues, while
the `owned_wait_queues_` member is protected by the relationship
between queues owned by threads.  They are not protected by the same
thing.

So, move `owned_wait_queues_` out of `wait_queue_state_` and put it in
Thread itself, allowing it to be more properly annotated moving
forward.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1099995
Original-Revision: f76ddf7f5bb0bc80d0ed3de495df8674a2c84cc8
GitOrigin-RevId: 0c3eba8b4f57b1d49ba2150080a01703ea8a627f
Change-Id: I58b2777e36602ae2d0c653b94661fcb03f72f73a