[clang] [clang-tools-extra] [clang-tidy] Add SARIF output to clang-tidy (PR #219182)

[Valentyn Yukhymenko via cfe-commits]

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@@ -105,6 +105,10 @@ infrastructure are described first, followed by tool-specific sections.
   piping from {program}`git` to {program}`clang-tidy-diff.py`, where slashes
   will now be automatically normalized.
 
+- Added a new {program}`clang-tidy` command line option `-export-sarif=<file>`
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BaLiKfromUA wrote:

Few small issues here:
- You probably forgot to rename the option name here; it should be `sarif-export` now, right?
- I believe the link to the SARIF bit should use a different link format since we are now in `.md` format.

https://github.com/llvm/llvm-project/pull/219182