[llvm] [DAG][X86] Avoid slow masked-store folds on Zen (PR #214187)

[via llvm-commits]

222rohan wrote:

@RKSimon can we add this flag to `-x86-64-v3` as well? This will significantly help Zen subtargets which regress as mentioned in issue #213195 

cc @phoebewang 

https://github.com/llvm/llvm-project/pull/214187