Enabled performance-inefficient-vector-operation check in clang-tidy

.clang-tidy

@@ -19,7 +19,6 @@ modernize-*,\
 -modernize-use-using,\
 performance-*,\
 -performance-inefficient-string-concatenation,\
--performance-inefficient-vector-operation,\
 readability-*,\
 -readability-function-size,\
 -readability-identifier-naming,\

Source/cmSourceGroupCommand.cxx

@@ -77,6 +77,7 @@ std::vector<std::string> prepareFilesPathsForTree(
   const std::string& currentSourceDir)
 {
   std::vector<std::string> prepared;
+  prepared.reserve(filesPaths.size());
 
   for (auto const& filePath : filesPaths) {
     prepared.push_back(prepareFilePathForTree(filePath, currentSourceDir));