Fixed Session::queryInterface not returning OK when querying for IUnknown/ISlangUnknown #6633

Job	Run time
build (linux, debug, gcc, x86_64)	13m 18s
build (linux, release, gcc, x86_64)	19m 28s
build (linux, release, gcc, wasm)	15m 38s
build (macos, debug, clang, aarch64)	8m 47s
build (macos, release, clang, aarch64)	17m 10s
build (windows, debug, cl, x86_64)	16m 14s
build (windows, release, cl, x86_64)	16m 29s
build (linux, release, gcc, aarch64, smoke, false, self-hosted, Linux, ARM64, true)	25m 21s
	2h 12m 25s

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