This commit provides a minimal API for capturing a graphics
frame, save it and replay it later for debugging. The intention
here is to provide the basic need for future work to allow capturing
through tooling or programmatically from code. This API is
intended to be cross-platform by using Metal Capture Manager on
Apple devices and RenderDoc C++ API everywhere else.
Task-number: QTBUG-114067
Change-Id: If72d92bdef5e5985a0ec2e85e97fd1182da3c53c
Reviewed-by: Janne Koskinen <janne.p.koskinen@qt.io>
