This will allow compressing direct to physical texture on platforms that support it
Some small RHI changes will have to be approved before turning on though
#ROBOMERGE-SOURCE: CL 9291051 via CL 9291054 via CL 9291057 via CL 9291060
#ROBOMERGE-BOT: (v452-9288972)
[CL 9291062 by jeremy moore in Main branch]
Gives much better quality result but encoding is slower and there is a 25% memory increase in the physical texture
#ROBOMERGE-SOURCE: CL 8997086 via CL 8997134 via CL 8997199
#ROBOMERGE-BOT: (v442-8990807)
[CL 8997226 by jeremy moore in Main branch]
Fixes check firing in RHIUpdateUniformBuffer()
#ROBOMERGE-SOURCE: CL 8405326 via CL 8405516
#ROBOMERGE-BOT: (v404-8404397)
[CL 8405520 by jeremy moore in Main branch]