SL-19228: Fix GLTF texture transform rotation + add UV debug

SL-19228: Fix GLTF texture transform rotation and add UV debug (PBR only). See textureUtilV.glsl for UV coordinate comments

DRTVWR-559 Fix for irradiance maps going black at 128x128 radiance map resolution.  Improve radiance map anti-aliasing and default to 128x128 everywhere.

DRTVWR-559 Fix for stall in probe occlusion culling and fix for culled neighbors getting sampled (badly).

DRTVWR-559 WIP -- occlusion culling for reflection probes -- has a defect for objects close to the camera at some angles and leaks query objects, will follow up.

SL-19239 Day after three day quality pass - add ACES tone mapping to address "haziness" (and also fix banding in emissive materials)

Fix for crash on startup for M1 macs

SL-19121: Add some override tests

SL-18927 Warn *before* destroying content, not after.  Followup from last commit -- immediately apply scale to sphere probes.

SL-19002: Handle edge case in client networking which could cause material ID and overrides to become out-of-sync

SL-19002: Stop sending material IDs from client via material params and just call queueApply/queueModify

Crash on startup for M1 macs

SL-19191

SL-19080: GLTF Material asset consistency: Part 2: Update viewer GLTF Material asset upload to v1.1

SL-18762 Fix for broken local lights on alpha when wearing a HUD attachment.  Also fix stuck sun/moon and incidental decruft.

As it happens, the change in the LLUUID::combine() algorithm introduced by one
of my previous commits is causing invalid assets creation (seen with
some clothing items, such as Shape and Universal types); obviously, the server
is using the old algorithm for UUID validation purpose of these assets.

This commit reverts LLUUID::combine() code to use LLMD5.

SL-19080: Restrict LLGLTFMaterial fields test to a single compiler target, as results can vary between compilers