SL-17286 Reflection probe alpha/fullbright support.

indra/llrender/llglslshader.h

indra/llrender/llshadermgr.cpp

...pp_settings/shaders/class1/deferred/fullbrightShinyF.glsl

...pp_settings/shaders/class1/deferred/fullbrightShinyV.glsl

...wview/app_settings/shaders/class1/deferred/materialF.glsl

...pp_settings/shaders/class1/deferred/reflectionProbeF.glsl

...pp_settings/shaders/class2/deferred/reflectionProbeF.glsl

...ew/app_settings/shaders/class2/deferred/softenLightF.glsl

indra/newview/lldrawpoolbump.cpp

indra/newview/llreflectionmapmanager.cpp

indra/newview/llviewershadermgr.cpp

indra/newview/pipeline.cpp

indra/newview/pipeline.h