[llvm] [AArch64] Fix DUP-of-extload combine to ignore chain uses (PR #201351)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-offload-amdgpu-runtime-2` running on `rocm-worker-hw-02` while building `llvm` at step 11 "Add check check-compiler-rt-amdgcn-amd-amdhsa".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/10/builds/29409

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

```
Step 11 (Add check check-compiler-rt-amdgcn-amd-amdhsa) failure: test (failure)
ninja: error: unknown target 'check-compiler-rt-amdgcn-amd-amdhsa'

```

</details>

https://github.com/llvm/llvm-project/pull/201351