[10/11][Clang][RISCV] Expand all variants for vget on tuple types

[10/11][Clang][RISCV] Expand all variants for vget on tuple types

This is the 10th patch of the patch-set. For the cover letter, please
checkout D152069.

Depends on D152077.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D152078