Uses the two compute shaders from Qt Quick 3D. Demonstrates
and tests both RGBA16F textures and using them (and doing
load/store with mip levels individually) in combination with
compute.
Task-number: QTBUG-81213
Change-Id: I3f0f250d5997a26c857b7c45517684c63b44e58e
Reviewed-by: Johan Helsing <johan.helsing@qt.io>
