[llvm] GlobalISel: Relax verifier between physreg and typed vreg (PR #159281)

[Petar Avramovic via llvm-commits]

petar-avramovic wrote:

`%0:(s1) = COPY $vcc` looks more convenient then `s64`, why is copy better then doing `%0:(s1) = call i1 @llvm.amdgcn.inverse.ballot.i64 $vcc`
Why do we need to use $vcc explicitly in GlobalISel?

https://github.com/llvm/llvm-project/pull/159281