[Metal] Fix missing baseInstance while still supporting older version… #534

Job	Run time
build_windows (Visual Studio 17 2022, x64, Shared, Release)	5m 16s
build_windows (Visual Studio 17 2022, x64, Shared, Debug)	5m 23s
build_windows (Visual Studio 17 2022, x64, Static, Release)	5m 6s
build_windows (Visual Studio 17 2022, x64, Static, Debug)	4m 44s
build_windows (Visual Studio 17 2022, Win32, Shared, Release)	5m 30s
build_windows (Visual Studio 17 2022, Win32, Shared, Debug)	4m 42s
build_windows (Visual Studio 17 2022, Win32, Static, Release)	5m 12s
build_windows (Visual Studio 17 2022, Win32, Static, Debug)	5m 33s
build_windows (Visual Studio 16 2019, x64, Shared, Release)	5m 43s
build_windows (Visual Studio 16 2019, x64, Shared, Debug)	6m 9s
build_windows (Visual Studio 16 2019, x64, Static, Release)	4m 59s
build_windows (Visual Studio 16 2019, x64, Static, Debug)	5m 22s
build_windows (Visual Studio 16 2019, Win32, Shared, Release)	5m 13s
build_windows (Visual Studio 16 2019, Win32, Shared, Debug)	4m 52s
build_windows (Visual Studio 16 2019, Win32, Static, Release)	4m 58s
build_windows (Visual Studio 16 2019, Win32, Static, Debug)	5m 12s
	1h 23m 54s

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