Fix legacy *.lib files not obeying CMAKE_INSTALL_LIBDIR variable. (#1… #3650

Job	Run time
codespell	14s
copyright_check	0s
examples_clang-format	5s
doc_examples_ubuntu-latest_g++_cxx20_relwithdebinfo	43s
examples_ubuntu-latest_g++_cxx14_relwithdebinfo_preview=OFF	3m 42s
ubuntu-latest_g++_cxx14_relwithdebinfo_preview=OFF	20m 11s
examples_macos-15_clang++_cxx14_relwithdebinfo_preview=ON	2m 38s
examples_ubuntu-20.04_g++_cxx17_release_preview=ON	3m 44s
ubuntu-20.04_g++_cxx17_release_preview=ON	17m 26s
examples_ubuntu-20.04_g++-10_cxx20_debug_preview=ON	4m 34s
ubuntu-20.04_g++-10_cxx20_debug_preview=ON	14m 34s
macos-14_clang++_cxx14_relwithdebinfo_preview=ON	11m 10s
ubuntu-22.04_g++-11_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	17m 8s
macos-13_clang++_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	15m 21s
python_module_test_ubuntu_latest	35s
doc_examples_windows-2022_cl_cxx20_relwithdebinfo	1m 59s
examples_windows_cl2019_cxx14_relwithdebinfo_preview=ON	5m 59s
windows_cl2019_cxx14_relwithdebinfo_preview=ON	14m 19s
windows_cl2019_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	21m 30s
windows_cl2022_cxx17_relwithdebinfo_preview=OFF	16m 42s
examples_windows_cl2022_cxx17_relwithdebinfo_preview=OFF	6m 51s
documentation	49s
pages	9s
	3h 0m 23s

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