[RISCV] Update Zba, Zbb, Zbc, and Zbs version from 0.93 to 1.0.

I've removed the Zbs W instructions that are not part of the frozen spec.

References to B as an extension name have been removed. Tests are updated or split accordingly.

Reviewed By: luismarques

Differential Revision: https://reviews.llvm.org/D110669