Redundant .c_str() usage in rclcpp_components triggers ament_clang_tidy warning (#2718)

* fix: Simplify string assignment for class name in node_main.cpp.in

Signed-off-by: LihanChen2004 <757003373@qq.com>

* Remove redundant local variable `name`

Co-authored-by: Tomoya Fujita <Tomoya.Fujita@sony.com>
Signed-off-by: LihanChen2004 <74599182+LihanChen2004@users.noreply.github.com>

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Signed-off-by: LihanChen2004 <757003373@qq.com>
Signed-off-by: LihanChen2004 <74599182+LihanChen2004@users.noreply.github.com>
Co-authored-by: Tomoya Fujita <Tomoya.Fujita@sony.com>

Author: LihanChen2004

rclcpp_components/src/node_main.cpp.in

@@ -40,8 +40,7 @@ int main(int argc, char * argv[])
   auto loader = new class_loader::ClassLoader(library_name);
   auto classes = loader->getAvailableClasses<rclcpp_components::NodeFactory>();
   for (const auto & clazz : classes) {
-    std::string name = clazz.c_str();
-    if (name.compare(class_name) == 0) {
+    if (clazz.compare(class_name) == 0) {
       RCLCPP_DEBUG(logger, "Instantiate class %s", clazz.c_str());
       std::shared_ptr<rclcpp_components::NodeFactory> node_factory = nullptr;
       try {