[clang] [llvm] [mlir] Move several vector intrinsics out of experimental namespace (PR #88748)

[Cullen Rhodes via cfe-commits]

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@@ -0,0 +1,46 @@
+; RUN: opt -S < %s | FileCheck %s
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c-rhodes wrote:

this `opt` line can be removed? Likewise for other upgrade tests.

https://github.com/llvm/llvm-project/pull/88748