SL-915, MAINT-8554 - WIP on managing dynamic avatar bounding box, using to constrain encroachment by animated objects

cmake -E copy does only one file at a time, and older CMake versions don't
handle wildcards. But cmake -E copy is specifically for portability. When the
copy operation itself is Darwin-only, we can count on having 'cp' available.

Update KDU stubs in integration test.

Work around MAINT-8675 stale cert in llsechandler_basic for now.

Update stubs for LLTrans::getString in handful of integration tests.

MAINT-8348 [LOVE ME RENDER] Edit Rotation Rings Occluded by Mesh Objects

Approved-by: Andrey Lihatskiy <andreylproductengine@lindenlab.com>

FIXED

+ null checks in LLVOVolume::setLightTextureID()

Wire selection mode - while Edit tool is selected
Outline selection mode - for all other case