Overhaul of the intel-mkl package

["M. Zhou" <lumin@debian.org>]

Hi team,

This is a message on my future plan to overhaul the intel-mkl package.
Some people (bcc'ed) from intel are interested as well,
so I'm sharing the plan to a public list.

The current MKL version in our archive has been outdated for 3 years
https://salsa.debian.org/science-team/intel-mkl
largely because of Intel's OneAPI transition, significantly changed
the components and the upstream package layout.

These are the next steps to overhaul the package to make it more
maintainable:

1. Greatly simplify the binary package layout.
   We split the upstream package into very fine-grained packages.
   But it is not really that necessary. For the next update,
   we should trim the binary packages into only two:

    bin:libmkl-rt
    bin:libmkl-dev

   All the other packages will be deleted and replaced by the new ones.

2. Different from the intel's upstream .deb packages, we will make
   the installed files follow the FHS.

3. Different from intel's upstream installation, we will not install
   all the SYCL and OpenCL related binary files. SYCL is not yet
   incorporated into Debian.

   So currently we can only make it CPU-only.

4. Different from the upstream .deb packages, we integrate the
   libmkl-rt package into our update-alternatives system for
   libblas.so and liblapack.so . I'll still keep it in shape
   for the next upload.

That should be it. The current packaging of intel-mkl is just
overcomplicated. The python script for generating the installation
control files should be replaced by Makefile/bash as well.