[clang-tools-extra] [clang-tidy] Replace /* ... */ single-line comments with // ... comments (PR #124319)

[via cfe-commits]

4m4n-x-B4w4ne wrote:

> As @PiotrZSL mentioned in the issue, adding an option called something like `ExcludeDoxygenStyleComments` would be very helpful (or even necessary) before releasing this check. Otherwise, it could create a lot of trouble for projects that use doxygen for their documentation (including LLVM itself). Doxygen comments typically look like this:
> 
> ```c++
> /**
>  * ... text ...
>  */
>  void foo()
> ```
> 
> With this option enabled, I think we should exclude the following cases:
> 
> ```c++
> /**
>  * ... text ...
>  */
>  
> /*!
>  * ... text ...
>  */
>  
> /***********************************************
>  *  ... text
>  ***********************************************/
> ```
> 
> Basically, they are comments that start with `/*` followed by more than one `*` or start with `/*!` More detailed documentation can be found in https://www.doxygen.nl/manual/docblocks.html.
> 
> This option can also be tested on LLVM codebase for false positives.

I have done this can you please check.

https://github.com/llvm/llvm-project/pull/124319