7064877 - RDG Resource Barrier Fixes and Improvements.
- Resource barriers are now batched and submitted as a group at the beginning of a pass.
- UAVs referencing the same underlying resource now only submit a single write barrier instead of a write + N UAV barriers.
- During a mip generation pass, barriers are not issued for textures (they are implicitly converted to the SubRWBarrier state).
- Depth / stencil read now transitions to the read state; this allows DSV + SRV to work correctly.
#jira UE-76196
#rb Guillaume.Abadie
7064884 - Fixed RHI resource transitions causing validation failures.
#rb Rolando.Caloca
#jira none
7064898 - Fixed issue where implementation of RHICopyTexture would only copy mip 0, breaking environment probe copies.
#jira UE-76203
#rb Jeremy.Moore
[CL 7066658 by zach bethel in Dev-Rendering branch]
175fc044be