[llvm] [SPIRV] Addition of image_store.ll and signed_arithmetic_overflow.ll (PR #152289)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-lld-multistage-test` running on `ppc64le-lld-multistage-test` while building `llvm` at step 12 "build-stage2-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/168/builds/16392

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

```
Step 12 (build-stage2-unified-tree) failure: build (failure) (timed out)
...
616.556 [56/10/6648] Linking CXX executable bin/llvm-c-test
616.595 [56/9/6649] Linking CXX executable bin/llvm-opt-fuzzer
616.670 [56/8/6650] Linking CXX executable unittests/DebugInfo/DWARF/DebugInfoDWARFTests
616.681 [56/7/6651] Linking CXX executable bin/llvm-split
616.734 [56/6/6652] Linking CXX executable unittests/CodeGen/CGPluginTest/CGPluginTest
616.737 [56/5/6653] Linking CXX executable unittests/MI/MITests
616.782 [56/4/6654] Linking CXX executable bin/llvm-lto
616.803 [56/3/6655] Linking CXX executable bin/lld
642.901 [56/2/6656] Building CXX object tools/bugpoint-passes/CMakeFiles/BugpointPasses.dir/TestPasses.cpp.o
643.153 [55/2/6657] Linking CXX shared module lib/BugpointPasses.so
command timed out: 1200 seconds without output running [b'ninja'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1844.084990

```

</details>

https://github.com/llvm/llvm-project/pull/152289