Map `SV_InstanceID` to `gl_InstanceIndex-gl_BaseInstance` #8047

Job	Run time
build (linux, debug, gcc, x86_64)	13m 45s
build (linux, release, gcc, x86_64)	16m 6s
build (linux, release, gcc, wasm)	16m 2s
build (macos, debug, clang, aarch64)	9m 23s
build (macos, release, clang, aarch64)	16m 1s
build (windows, debug, cl, x86_64)	16m 1s
build (windows, release, cl, x86_64)	12m 27s
build (linux, release, gcc, aarch64, smoke, false, self-hosted, Linux, ARM64, true)	10m 55s
	1h 50m 40s

Provide feedback