[clang-tools-extra] [include-cleaner] Report project declarations of standard library names (PR #230133)

[via cfe-commits]

================
@@ -128,6 +128,14 @@ infrastructure are described first, followed by tool-specific sections.
 
 ### Improvements to clang-query
 
+### Improvements to include-cleaner
----------------
EugeneZelenko wrote:

```suggestion
### Improvements to clang-include-cleaner
```

Per [`clang-tools-extra/include-cleaner/tool/CMakeLists.txt`.](https://github.com/llvm/llvm-project/blob/main/clang-tools-extra/include-cleaner/tool/CMakeLists.txt)

https://github.com/llvm/llvm-project/pull/230133