Merge topic 'FindBLAS-LAPACK-All' into release-3.21
31ac4b9165 ci: Verify that Intel MKL is found when it is the only BLAS/LAPACK
57dcde19da Find{BLAS,LAPACK}: Avoid clobbering results when no vendor is requested
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !6336