[clang] [CIR] max-across-vector (vmaxv_*) intrinsics (PR #194401)

[Andrzej Warzyński via cfe-commits]

================
@@ -24,6 +24,175 @@
 
 #include <arm_neon.h>
 
+//===------------------------------------------------------===//
+// 2.1.1.13 Maximum across vector
----------------
banach-space wrote:

```suggestion
// 2.1.1.13.3 Maximum across vector
```

https://github.com/llvm/llvm-project/pull/194401