[clang] [clang][bytecode] Use a regular static function in `Pointer::toRValue()` (PR #219772)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-sve-vls` running on `linaro-g3-01` while building `clang` at step 7 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/143/builds/16866

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

```
Step 7 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'Clang :: Analysis/ftime-trace.cpp' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/bin/clang -cc1 -internal-isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/lib/clang/24/include -nostdsysteminc -analyze -setup-static-analyzer -analyzer-checker=core /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/llvm/clang/test/Analysis/ftime-trace.cpp -ftime-trace=/home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.raw.json -ftime-trace-granularity=0 -verify
# executed command: /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/bin/clang -cc1 -internal-isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/lib/clang/24/include -nostdsysteminc -analyze -setup-static-analyzer -analyzer-checker=core /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/llvm/clang/test/Analysis/ftime-trace.cpp -ftime-trace=/home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.raw.json -ftime-trace-granularity=0 -verify
# RUN: at line 2
"/usr/bin/python3.10" -c 'import json, sys; print(json.dumps(json.load(sys.stdin), indent=4))' < /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.raw.json > /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json
# executed command: /usr/bin/python3.10 -c 'import json, sys; print(json.dumps(json.load(sys.stdin), indent=4))'
# RUN: at line 3
/home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/bin/FileCheck --input-file=/home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json --check-prefix=CHECK /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/llvm/clang/test/Analysis/ftime-trace.cpp
# executed command: /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/bin/FileCheck --input-file=/home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json --check-prefix=CHECK /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/llvm/clang/test/Analysis/ftime-trace.cpp
# .---command stderr------------
# | /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/llvm/clang/test/Analysis/ftime-trace.cpp:34:11: error: CHECK: expected string not found in input
# | // CHECK: "name": "Total CheckerManager::runCheckersForStmt (Pre)",
# |           ^
# | /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json:2618:3: note: scanning from here
# |  }
# |   ^
# | /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json:2818:2: note: possible intended match here
# |  "name": "Total CheckerManager::runCheckersForStmt (Post)",
# |  ^
# | 
# | Input file: /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/stage1/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json
# | Check file: /home/tcwg-buildbot/worker/clang-aarch64-sve-vls/llvm/clang/test/Analysis/ftime-trace.cpp
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |          2613:  "dur": 706, 
# |          2614:  "name": "Total dispatchWorkItem PostStmt", 
# |          2615:  "args": { 
# |          2616:  "count": 31, 
# |          2617:  "avg ms": 0 
# |          2618:  } 
# | check:34'0      {   search range start (exclusive)
# | check:34'1          error: no match found in search range
# |          2619:  }, 
# |          2620:  { 
# |          2621:  "pid": 1703087, 
# |          2622:  "tid": 1703094, 
# |          2623:  "ph": "X", 
# |             .
# |             .
...

```

</details>

https://github.com/llvm/llvm-project/pull/219772