Support for RISC-V architecture

[amgrigoriev]

Use case RISC-V is an upcoming CPU architecture with very energy-efficient processors. At the moment, it is possible to build numpy, scipy and sklearn for RISC-V platform using publicly available RISC-V toolchains. It looks like there is no any critical obstacle for RISC-V support in oneDAL. Such a support could also enable sklearnex on RISC-V.

Proposal

• Add RISC-V support for oneDAL