nvk: Rework TLS/SLM and image/sampler table handling

nvk: Rework TLS/SLM and image/sampler table handling

When Dave originally added SLM, he did so with a preamble pushbuf which
sets up the SLM area prior to executing any actual command buffers.
This has the advantage that the SLM BO is never directly referenced in
any command buffer and we can swap it out even after command buffers
have been built.  When I added image/sampler tables, I sort-of went
along with it but then did something different for 3D.

Thanks to buffer reference counting, we can employ a fairly simple
locking scheme.  Each of the globals: images, samplers, and TSL has a
lock which gets taken whenever the table is modified.  When we go to do
a submit, we take each lock and take a queue-local reference to the BO
and grab a copy of its size parameter under the lock.  If anything has
changed, we update the queue-local preamble pushbuf.  Because the queue
also holds a reference, we can safely proceed to submit command buffers
which reference those global BOs without the individual global locks
taken.  If SLM or one of the descriptor tables resizes while we're
mid-submit, our reference to the BO will remain valid until either the
destruction of the queue or the next submit.

The one small bit of threaded cleverness (one always has to be careful
with that) is that the SLM size can be checked without taking the lock
because the SLM size only ever increases.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24326>