[clang] [clang][bytecode] Fix multi-word complex division (PR #181325)

[via cfe-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 86175 tests passed
* 1265 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### Clang
<details>
<summary>Clang.AST/ByteCode/complex.c</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang -cc1 -internal-isystem /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/23/include -nostdsysteminc -fexperimental-new-constant-interpreter -verify=expected,both -Wno-unused-value /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/AST/ByteCode/complex.c
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang -cc1 -internal-isystem /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/23/include -nostdsysteminc -fexperimental-new-constant-interpreter -verify=expected,both -Wno-unused-value /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/AST/ByteCode/complex.c
# .---command stderr------------
# | error: diagnostics with 'warning' severity seen but not expected: 
# |   File /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/AST/ByteCode/complex.c Line 32: '_BitInt' suffix for literals is a C23 extension
# |   File /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/AST/ByteCode/complex.c Line 32: '_BitInt' suffix for literals is a C23 extension
# | 2 errors generated.
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/181325