rhi: metal: Move macOS 13 pipeline cache workaround to the backend

To allow removing the MACOS && IOS ifdefs from Qt Quick. The check is
taken care of by the QRhi Metal backend instead.

The logic is now slightly more sophisticated than just outright
skipping the whole feature: we know that the problems (crash on
M1/M2, and suspicious, constant blob size increases also on Macs
with Intel graphics once upgraded to macOS 13) are triggered when
new render/compute pipelines are registered to a MTLBinaryArchive
that already loaded some data from a file serialized in a previous
run of the application. Therefore, we just skip registering new
pipelines when we believe it is not going to be safe. The rest of
the persistent pipeline cache support is left intact and operates
normally.

Task-number: QTBUG-106703
Task-number: QTBUG-108216
Change-Id: Id3cc931dfbd940a3e6820ee9294459e4993e9ca7
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

0 files changed, 0 insertions, 0 deletions