Add Slang and HLSL shaders to first set of samples #3842

Job	Run time
Build windows in Debug	30m 36s
Build ubuntu in Release	1m 49s
Build windows in Release	3m 5s
Build windows in Release	30m 36s
Build ubuntu in Debug	28m 47s
Build Ubuntu with Direct To Display	3m 41s
Build Android in Debug	17m 49s
Build ubuntu in Release	27m 9s
Build ios in ${{ matrix.build_type }}	1s
Build ${{ matrix.platform }} in ${{ matrix.build_type }}	1s
	2h 23m 34s

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