Draft: Ast 1370 applying h5parm solutions
- Implementation of a H5 parameters cache.
- Draft merge request, no code style included.
- Analyze the general implementation.
- Verify this implementation works for H5 files different from those used for reproduce the problem.
- To test WSClean using this branch, pull this WSClean branch: https://gitlab.com/aroffringa/wsclean/-/tree/ast-1370-applying-h5parm-solutions-painfully-slow It should use download this branch of schaapcommon under 'external' directory.