Find BLAS: replace libblis|libmkl|libopenblas by blis|mkl|openblas to fix case when libraries are directly given by users, and used as it is, with -L and -l options (no absolute path)

morse_check_static_or_dynamic: we may not find the libraries extension, if given by the user as a list of linker flags (can be many different things), e.g. -Wl,-rpath,/opt/lib -L/opt/lib -lfoo -lbar, so that we replace FATAL_ERROR by WARNING in the message if extension not found

Fix a bug with intelmpi linker flag not recognize e.g. --enable-new-dtags -Xlinker -rpath -Xlinker ...

CMAKE_REQUIRED_LIBRARIES is supposed to be a ;-separated list of libraries to link. Linker flags must be set in CMAKE_REQUIRED_FLAGS.

We check that the simgrid_init function exists rather than the MSG_main function which is no longer used by default in simgrid

Add a common macro to export imported targets. This to avoid dependents to search for our dependencies at configure time.

cblas_check_include and lapacke_check_include: function in cmake does not change variables so that CBLAS_INCLUDE_DIRS/LAPACKE_INCLUDE_DIRS was not updated. Use a macro instead of a function.