[clang-tools-extra] [clang-tidy] Detect std::popcount opportunity within modernize.use-std-bit (PR #185740)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- clang-tools-extra/clang-tidy/modernize/UseStdBitCheck.cpp clang-tools-extra/test/clang-tidy/checkers/modernize/use-std-bit.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang-tools-extra/clang-tidy/modernize/UseStdBitCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseStdBitCheck.cpp
index 01333bb70..319f9ea31 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseStdBitCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseStdBitCheck.cpp
@@ -127,8 +127,7 @@ void UseStdBitCheck::check(const MatchFinder::MatchResult &Result) {
     const uint64_t MatchedVarSize = Context.getTypeSize(MatchedArg->getType());
     if (BitsetSize < MatchedVarSize)
       return;
-    auto Diag =
-        diag(MatchedExpr->getBeginLoc(), "use 'std::popcount' instead");
+    auto Diag = diag(MatchedExpr->getBeginLoc(), "use 'std::popcount' instead");
     Diag << FixItHint::CreateRemoval(CharSourceRange::getTokenRange(
                 MatchedArg->getEndLoc().getLocWithOffset(1),
                 MatchedExpr->getRParenLoc().getLocWithOffset(-1)))

``````````

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https://github.com/llvm/llvm-project/pull/185740