[NFC][PowerPC] adding the arguments for register names and VSR to VR (#155991)
NFC patch to add the flags `-ppc-asm-full-reg-names
--ppc-vsr-nums-as-vr` to the test file
`llvm/test/CodeGen/PowerPC/check-zero-vector.ll`.
Created this PR based on this discussion:
https://github.com/llvm/llvm-project/pull/151971#issuecomment-3234090675
Co-authored-by: himadhith <himadhith.v@ibm.com>
Co-authored-by: Lei Huang <lei@ca.ibm.com>