[clang-tools-extra] [clang-tidy] Add `llvm-formatv-string` (PR #195974)

[via cfe-commits]

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@@ -133,6 +125,12 @@ New checks
   Finds functions where throwing exceptions is unsafe but the function is still
   marked as potentially throwing.
 
+- New :doc:`llvm-formatv-string
+  <clang-tidy/checks/llvm/formatv-string>` check.
+
+  Validates ``llvm::formatv`` format strings against the provided arguments,
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EugeneZelenko wrote:

Please synchronize with first statement in documentation.

https://github.com/llvm/llvm-project/pull/195974