* LIBXS (https://libxs.readthedocs.io/) foundational library.
- Implements SMMs with different JIT providers, e.g., MKL-JIT.
- LIBXSMM only provides kernels (reg. upstream version).
* LIBXSTREAM (https://libxstream.readthedocs.io/).
- Revised OpenCL backend now formally separate.
* CMake and Toolchain
- Eliminated mkl_sequential/mkl_gnu_thread mismatch.
- Toolchain adjusted for libxs/libxstream/libxsmm.
- Case-insensitive CP2K_USE_ACCEL.
DBCSR originally wanted lower case.
This is to harmonize with DBCSR.
- Allow CP2K's FYPP to be used for DBCSR.
This enables DBCSR Tarball versions.
* Regenerated all Docker recipes.
- This make FYPP available for DBCSR build.
- This enables DBCSR Tarball versions.
