CMake: fix RPATH on macos #186

Job	Run time
ubuntu-latest - Env all Release	1m 47s
ubuntu-latest - Env all Debug	3m 14s
ubuntu-latest - Env all-py39 Release	42m 57s
ubuntu-latest - Env all-py39 Debug	41m 42s
macos-latest - Env all Release	1m 44s
macos-latest - Env all Debug	21m 56s
macos-latest - Env all-py39 Release	25m 36s
macos-latest - Env all-py39 Debug	19m 35s
macos-13 - Env all Release	3m 36s
macos-13 - Env all Debug	4m 9s
macos-13 - Env all-py39 Release	1h 2m 5s
macos-13 - Env all-py39 Debug	38m 54s
windows-latest - Env all Release	1h 14m 53s
windows-latest - Env all-clang-cl Release	36m 36s
check-macos-linux-windows-pixi	1s
	6h 18m 45s

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