Cache glslang-related build artifacts on CI

[TheMostDiligent]

• Leverage the option to provide external third-party libraries:
  • Add special CMake file that will only be used on CI and that will try to find pre-built static libraries in a given folder. If libraries exist, create corresponding targets.
• Add a small CMake file that will output compiler ID to file
• Use Compiler ID + configuration + platform + bit (32 vs 64) + third-party hash as key
• After build succeeds, copy relevant files to the cache folder

Cache action link https://github.com/DiligentGraphics/DiligentCore/commit/6976c60a9d7a746ccdcf6ca8403c7cb042fa6d29 Caching dependencies to speed up workflows