[clang] [CIR] Fix convertSideEffectForCall header/definition signature mismatch (PR #185118)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/45076

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

```
Step 6 (test-build-unified-tree-check-flang) failure: 1200 seconds without output running [b'ninja', b'check-flang'], attempting to kill
...
PASS: Flang :: Transforms/tbaa-local-alloc-threshold.fir (4247 of 4257)
PASS: Flang :: Transforms/dlti-dependency.fir (4248 of 4257)
PASS: Flang :: Driver/use-module.f90 (4249 of 4257)
PASS: Flang :: Transforms/vscale-attr.fir (4250 of 4257)
PASS: Flang :: Transforms/debug-line-table.fir (4251 of 4257)
PASS: flang-Unit :: Optimizer/./FlangOptimizerTests/147/150 (4252 of 4257)
PASS: Flang :: Transforms/debug-dwarf-version.fir (4253 of 4257)
PASS: Flang :: Driver/linker-options.f90 (4254 of 4257)
PASS: Flang :: Driver/omp-driver-offload.f90 (4255 of 4257)
PASS: Flang :: Lower/OpenMP/rtl-flags.f90 (4256 of 4257)
command timed out: 1200 seconds without output running [b'ninja', b'check-flang'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=2197.512932

```

</details>

https://github.com/llvm/llvm-project/pull/185118