[llvm] [GlobalISel][AArch64] Legalize G_INSERT_VECTOR_ELT for SVE (PR #114310)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-quick` running on `linaro-clang-aarch64-quick` while building `llvm` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/65/builds/6961

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

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'LLVM :: CodeGen/AArch64/GlobalISel/legalize-vector-insert-elt.mir' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 2: /home/tcwg-buildbot/worker/clang-aarch64-quick/stage1/bin/llc -O0 -mtriple=aarch64-apple-ios -mattr=+sve -aarch64-enable-gisel-sve=1 -global-isel -start-before=legalizer -stop-after=instruction-select /home/tcwg-buildbot/worker/clang-aarch64-quick/llvm/llvm/test/CodeGen/AArch64/GlobalISel/legalize-vector-insert-elt.mir -o - | /home/tcwg-buildbot/worker/clang-aarch64-quick/stage1/bin/FileCheck /home/tcwg-buildbot/worker/clang-aarch64-quick/llvm/llvm/test/CodeGen/AArch64/GlobalISel/legalize-vector-insert-elt.mir --check-prefixes=CHECK,CHECK-SELECT
+ /home/tcwg-buildbot/worker/clang-aarch64-quick/stage1/bin/FileCheck /home/tcwg-buildbot/worker/clang-aarch64-quick/llvm/llvm/test/CodeGen/AArch64/GlobalISel/legalize-vector-insert-elt.mir --check-prefixes=CHECK,CHECK-SELECT
+ /home/tcwg-buildbot/worker/clang-aarch64-quick/stage1/bin/llc -O0 -mtriple=aarch64-apple-ios -mattr=+sve -aarch64-enable-gisel-sve=1 -global-isel -start-before=legalizer -stop-after=instruction-select /home/tcwg-buildbot/worker/clang-aarch64-quick/llvm/llvm/test/CodeGen/AArch64/GlobalISel/legalize-vector-insert-elt.mir -o -
error: no check strings found with prefix 'CHECK:'

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/114310