New clang-format-diff returns a non-zero status code when diffs exist leading apply-format to fail

[ynyyn]

Starting from llvm/llvm-project#70883 (around LLVM version 18.1.0), the clang-format-diff script now will exit with a non-zero status code if it detects there has formatting changes.

And this change from LLVM clang-format will break the assuming in apply-format script, here at L329,

clang-format-hooks/apply-format

Lines 323 to 329 in ac35e70

	"${git_args[@]}" "$@" \
	| "${format_diff_args[@]}" \
	-p1 \
	-style="$style" \
	-iregex="$exclusions_regex"'.*\.(c|cpp|cxx|cc|h|hpp|m|mm|js|java)' \
	> "$patch_dest" \
	|| exit 1

which stops apply-format to apply the diff as format fix to the local or git-staged files.