[llvm] [GISEL] Add IRTranslation for shufflevector on scalable vector types (PR #80378)

[Thorsten Schütt via llvm-commits]

tschuett wrote:

Could you please add the new opcode to https://github.com/llvm/llvm-project/blob/main/llvm/docs/GlobalISel/GenericOpcode.rst? Thanks.

https://github.com/llvm/llvm-project/pull/80378