[clang] [clang] Prevent stack overflow on deeply nested template arguments (PR #224393)

[Yanzuo Liu via cfe-commits]

================

----------------
zwuis wrote:

The `runWithSufficientStackSpace` covers too much code.

Currently:

```cpp
runWithSufficientStackSpace(... {
  // unrelated code

  // code causing stack overflow

  // unrelated code
})
```

Expected:

```cpp
// unrelated code

runWithSufficientStackSpace(... {
  // code causing stack overflow
})

// unrelated code
```

https://github.com/llvm/llvm-project/pull/224393