[Core][Future] Add linear algebra defines #14108
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📝 Description
This PR adds two headers to define the serial and MPI linear algebra types. The idea of these is two use the
structs inside as unique template arguments for all the new strategies environment.Besides simplifying quite a lot the implementation and reducing the template specialization complexity, these ensure that the linear algebra pairs (i.e., matrix and vector) are compatible. Also note that these also simplify the extension to other data types (e.g.,
floatvsdouble) or even to other array types.A subsequent PR will incorporate these (and other features) into the future strategies, schemes, builders and linear solvers.
EDIT: I placed them into
containersfolder without being sure if this is the best place. Feel free to suggest any other folder.