[clang] [clang-format] Add OneLineFormatOffRegex option (PR #137577)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-sve2-vla-2stage` running on `linaro-g4-01` while building `clang` at step 12 "ninja check 2".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/199/builds/3079

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

```
Step 12 (ninja check 2) failure: stage 2 checked (failure)
******************** TEST 'Clang-Unit :: ./AllClangUnitTests/48/51' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/tcwg-buildbot/worker/clang-aarch64-sve2-vla-2stage/stage2/tools/clang/unittests/./AllClangUnitTests-Clang-Unit-3551089-48-51.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=51 GTEST_SHARD_INDEX=48 /home/tcwg-buildbot/worker/clang-aarch64-sve2-vla-2stage/stage2/tools/clang/unittests/./AllClangUnitTests
--

Note: This is test shard 49 of 51.
[==========] Running 505 tests from 116 test suites.
[----------] Global test environment set-up.
[----------] 1 test from DirectoryEntryTest
[ RUN      ] DirectoryEntryTest.isSameRef
[       OK ] DirectoryEntryTest.isSameRef (0 ms)
[----------] 1 test from DirectoryEntryTest (0 ms total)

[----------] 1 test from MinimizeSourceToDependencyDirectivesTest
[ RUN      ] MinimizeSourceToDependencyDirectivesTest.EmptyHash
[       OK ] MinimizeSourceToDependencyDirectivesTest.EmptyHash (0 ms)
[----------] 1 test from MinimizeSourceToDependencyDirectivesTest (0 ms total)

[----------] 1 test from HeaderMapTest
[ RUN      ] HeaderMapTest.lookupFilename
[       OK ] HeaderMapTest.lookupFilename (0 ms)
[----------] 1 test from HeaderMapTest (0 ms total)

[----------] 1 test from ModuleDeclStateTest
[ RUN      ] ModuleDeclStateTest.ModuleImplementationPartition
[       OK ] ModuleDeclStateTest.ModuleImplementationPartition (0 ms)
[----------] 1 test from ModuleDeclStateTest (0 ms total)

[----------] 1 test from ToolChainTest
[ RUN      ] ToolChainTest.VFSGCCInstallation
[       OK ] ToolChainTest.VFSGCCInstallation (1 ms)
[----------] 1 test from ToolChainTest (1 ms total)

[----------] 1 test from MultilibTest
[ RUN      ] MultilibTest.SelectHard
[       OK ] MultilibTest.SelectHard (0 ms)
[----------] 1 test from MultilibTest (0 ms total)

[----------] 2 tests from ExprMutationAnalyzerTest
[ RUN      ] ExprMutationAnalyzerTest.FollowRefModified
[       OK ] ExprMutationAnalyzerTest.FollowRefModified (7 ms)
[ RUN      ] ExprMutationAnalyzerTest.PointeeMutatedByPassAsArgument
[       OK ] ExprMutationAnalyzerTest.PointeeMutatedByPassAsArgument (5 ms)
[----------] 2 tests from ExprMutationAnalyzerTest (12 ms total)

[----------] 1 test from ASTOpsTest
[ RUN      ] ASTOpsTest.ReferencedDeclsOnUnionInitList
[       OK ] ASTOpsTest.ReferencedDeclsOnUnionInitList (2 ms)
[----------] 1 test from ASTOpsTest (2 ms total)
...

```

</details>

https://github.com/llvm/llvm-project/pull/137577