Map `SV_InstanceID` to `gl_InstanceIndex-gl_BaseInstance` #8040

Job	Run time
build (linux, debug, gcc, x86_64)	14m 20s
build (linux, release, gcc, x86_64)	15m 43s
build (linux, release, gcc, wasm)	15m 44s
build (macos, debug, clang, aarch64)	2m 53s
build (macos, release, clang, aarch64)	3m 1s
build (windows, debug, cl, x86_64)	3m 56s
build (windows, release, cl, x86_64)	10m 9s
build (linux, release, gcc, aarch64, smoke, false, self-hosted, Linux, ARM64, true)	1s
	1h 5m 47s

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