[Mlir-commits] [mlir] [mlir][vector][nfc] Update tests for vector.xfter_{read|write} (PR #91943)

[Benjamin Maxwell]

https://github.com/MacDue approved this pull request.

LG (bar some nits)

P.s. I'd change the tag from `[nfc]` to `[test]` -- especially since you're adding a new test. 

https://github.com/llvm/llvm-project/pull/91943