Fix USE_PERL option usage

Once you define the USE_PERL variable it is always set as DEFINED regardless of its value. One should chack for the actual variable value.

* Add C conversions of the CBLAS tests for NOFORTRAN=1 builds

* Enable CTEST without Fortran and fix passing of BUILD_vartype options to exports/gensymbol

* Add C equivalents of the Fortran routines from Reference-LAPACK as fallbacks, and C_LAPACK variable to trigger their use

* Use linker response files and a custom link command to get around ARG_MAX limitations on OSX
* Reconfigure a redundant job on Azure to test shared library builds with CMAKE and DYNAMIC_ARCH on OSX

When both BUILD_SHARED_LIBS and BUILD_STATIC_LIBS are enabled,
cmake export both of them to OpenBLASTargets under tha same name `OpenBLAS::OpenBLAS`
which leads to fatal error about OpenBLAS::OpenBLAS being both static and shared target.
This change makes cmake export only the shared library in that case.
There is another solution to treat them as components,
but I am afraid that will make it backward incompatible.

Add some extra lines and indentations.