[clang-tools-extra] [NFC][clang-tidy] Add type annotations to rename_check.py (PR #108443)

[Nicolas van Kempen via cfe-commits]

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@@ -311,7 +315,7 @@ def main():
                 "Check name '%s' not found in %s. Exiting."
                 % (check_name_camel, cmake_lists)
             )
-            return 1
+            sys.exit(1)
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nicovank wrote:

Technically, this is a functional change. `return 1` was not doing anything beyond `return`. Exit with code 1 instead.

https://github.com/llvm/llvm-project/pull/108443