Probably the most annoying patch to review from the whole series --
Mark every buffer object use as accessed through some caching domain
with the sequence number of the current synchronization section of the
batch.  The additional argument of iris_use_pinned_bo() makes sure I'd
have gotten a compile error if I had missed any buffer added to the
batch validation list.

There are only a few exceptions where a buffer is left untracked while
adding it to the validation list, justified below:

 - Batch buffers: These are strictly read-only for the moment.

 - BLORP buffer objects: Their seqnos are bumped manually at the end
   of iris_blorp_exec() instead, in order to avoid plumbing domain
   information through BLORP address combining.

 - Scratch buffers: The contents of these are strictly thread-local.

 - Shader images and SSBOs: Accesses of these buffers are explicitly
   synchronized at the API level.

v2: Opt out of tracking more aggressively (Ken): In addition to the
    above, surface states, binding tables, instructions and most
    dynamic states are now left untracked, which means a *lot* more BO
    uses marked IRIS_DOMAIN_NONE which need to be reviewed extremely
    carefully, since the cache tracker won't be able to provide any
    coherency guarantees for them.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <!3875>