[clang-tools-extra] [run-clang-tidy, clang-tidy-diff] Accept directory as value for -export-fixes (PR #69453)

[Piotr Zegar via cfe-commits]

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@@ -327,14 +345,14 @@ def main():
     if yaml and args.export_fixes:
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PiotrZSL wrote:

if combine_fixes:

https://github.com/llvm/llvm-project/pull/69453