* Enable Shader Compilation support for Linux
* Add azslc package 3P definition for download
* Add AzslcGeader.azsli nad PlatformHeader.hlsli for Linux/Null and Linux/Vulkan (Copy of Android/Vulkan)
* Enable trait PAL_TRAIT_BUILD_ATOM_ASSET_SHADER_SUPPORTED for Linux
* Add platform builder file dependencies
* Updated AZ_TRAIT_ATOM_SHADERBUILDER_AZSLC to use new 3P linux version of azslc
* Add AtomShaderCapabilities.json, PlatformLimits.azasset for Linux (Copy from Android)
* Fix paths/values for Vulkan_Traits_Linux.h
* Enable trait PAL_TRAIT_BUILD_ATOM_ASSET_SHADER_SUPPORTED for Linux
* Enabled AZ_TRAIT_ATOM_VULKAN_LAYER_LUNARG_STD_VALIDATION_SUPPORT for Linux/Vulkan
* Added AzslcHeader.azsli, PlatformHeader.hlsli dependencies for Linux/Null and Linux/Vulkan in the platform builders for windows and mac for consistency
Signed-off-by: spham-amzn <spham@amazon.com>
Steve Pham
jiaweig
Chris Burel
alexpete