[clang] [clang][bytecode] Fix bit casts to IntAP types (PR #158509)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-armv8-quick` running on `linaro-clang-armv8-quick` while building `clang` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/154/builds/21492

<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 'Clang :: AST/ByteCode/builtin-bit-cast.cpp' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/clang -cc1 -internal-isystem /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/lib/clang/22/include -nostdsysteminc -verify=ref,both -std=c++2a -fsyntax-only /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ByteCode/builtin-bit-cast.cpp # RUN: at line 1
+ /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/clang -cc1 -internal-isystem /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/lib/clang/22/include -nostdsysteminc -verify=ref,both -std=c++2a -fsyntax-only /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ByteCode/builtin-bit-cast.cpp
error: diagnostics with 'error' severity seen but not expected: 
  File /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ByteCode/builtin-bit-cast.cpp Line 535: __int128 is not supported on this target
  File /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ByteCode/builtin-bit-cast.cpp Line 547: __int128 is not supported on this target
  File /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ByteCode/builtin-bit-cast.cpp Line 559: __int128 is not supported on this target
  File /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ByteCode/builtin-bit-cast.cpp Line 561: __int128 is not supported on this target
4 errors generated.

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/158509