[llvm] [LLVM][InstCombine] Add simplification of SVE compare intrinsics. (PR #211249)

[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/49150

<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-tblgen/op-attribute.td (4421 of 4439)
PASS: MLIR :: Transforms/invalid-parallel-loop-collapsing.mlir (4422 of 4439)
PASS: MLIR :: Transforms/inlining.mlir (4423 of 4439)
PASS: MLIR :: Transforms/canonicalize-cse-between-iterations.mlir (4424 of 4439)
PASS: MLIR :: mlir-translate/split-markers.mlir (4425 of 4439)
PASS: MLIR :: Dialect/Vector/vector-warp-distribute.mlir (4426 of 4439)
PASS: MLIR :: Pass/action-logging-filter.mlir (4427 of 4439)
PASS: MLIR :: Transforms/canonicalize-filter-dialects.mlir (4428 of 4439)
PASS: MLIR :: mlir-runner/verify-entry-point.mlir (4429 of 4439)
PASS: MLIR :: Pass/pipeline-parsing.mlir (4430 of 4439)
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=2467.635908

```

</details>

https://github.com/llvm/llvm-project/pull/211249