[clang] [llvm] [AArch64] Implement NEON vscale intrinsics (PR #100347)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-offload-sles-build-only` running on `rocm-worker-hw-04-sles` while building `clang,llvm` at step 6 "Add check check-clang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/140/builds/7532

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (Add check check-clang) failure: test (failure)
******************** TEST 'Clang :: CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 4: /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.build/bin/clang -cc1 -internal-isystem /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.build/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +neon -target-feature +fp8 -O3 -emit-llvm -o - /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c | /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.build/bin/FileCheck /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c
+ /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.build/bin/clang -cc1 -internal-isystem /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.build/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +neon -target-feature +fp8 -O3 -emit-llvm -o - /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c
+ /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.build/bin/FileCheck /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c
/home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c:2:10: fatal error: 'arm_neon.h' file not found
    2 | #include <arm_neon.h>
      |          ^~~~~~~~~~~~
1 error generated.
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.build/bin/FileCheck /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/100347