[llvm] [SPIR-V] Fix legalization rewriting non-zero size arrays to pointers (PR #222276)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-mlir-rhel-clang` running on `ppc64le-mlir-rhel-test` while building `llvm` at step 6 "test-build-check-mlir-build-only-check-mlir".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/129/builds/52233

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

```
Step 6 (test-build-check-mlir-build-only-check-mlir) failure: 1200 seconds without output running [b'ninja', b'check-mlir'], attempting to kill
...
PASS: MLIR :: mlir-reduce/reduction-tree/invalid.mlir (4597 of 4608)
PASS: MLIR :: mlir-reduce/reduction-tree/reduction-tree.mlir (4598 of 4608)
PASS: MLIR :: Transforms/inlining-recursive.mlir (4599 of 4608)
PASS: MLIR :: Transforms/inlining-repeated-use.mlir (4600 of 4608)
PASS: MLIR :: Dialect/OpenACC/ops-cg.mlir (4601 of 4608)
PASS: MLIR :: Dialect/OpenACC/ops.mlir (4602 of 4608)
PASS: MLIR :: Dialect/SparseTensor/sparse_lower_col.mlir (4603 of 4608)
PASS: MLIR :: Dialect/SparseTensor/sparse_lower_inplace.mlir (4604 of 4608)
PASS: MLIR :: Dialect/Tosa/tosa-narrow-f32-to-f16-aggressive.mlir (4605 of 4608)
PASS: MLIR :: Dialect/Tosa/tosa-narrow-f32-to-f16.mlir (4606 of 4608)
command timed out: 1200 seconds without output running [b'ninja', b'check-mlir'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=2648.350691

```

</details>

https://github.com/llvm/llvm-project/pull/222276