[clang] [analyzer] Untangle subcheckers of CStringChecker (PR #113312)

[via cfe-commits]

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@@ -579,8 +579,14 @@ ProgramStateRef CStringChecker::CheckLocation(CheckerContext &C,
     // These checks are either enabled by the CString out-of-bounds checker
     // explicitly or implicitly by the Malloc checker.
     // In the latter case we only do modeling but do not emit warning.
-    if (!Filter.CheckCStringOutOfBounds)
-      return nullptr;
+    // FIXME: We detected a fatal error here, we should stop analysis even if we
+    // chose not to emit a report here. However, as long as our out-of-bounds
+    // checker is in alpha, lets just pretend nothing happened.
----------------
isuckatcs wrote:

```suggestion
    // FIXME: We detected a fatal error here, and we should stop the analysis even if we
    // choose not to emit a report here. However, as long as our out-of-bounds
    // checker is in alpha, let's just pretend that nothing happened.
```

Nit: typos

https://github.com/llvm/llvm-project/pull/113312