Use std::filesystem instead of rcpputils::fs functions

- Rationale: Deprecation of the rcpputils::fs in future
See ros2/rcpputils#164 for details

Signed-off-by: Michael Orlov <michael.orlov@apex.ai>

rosbag2_tests/test/rosbag2_tests/test_rosbag2_cpp_get_service_info.cpp

@@ -15,6 +15,7 @@
 #include <gmock/gmock.h>
 
 #include <chrono>
+#include <filesystem>
 #include <string>
 
 #include "rosbag2_cpp/info.hpp"
@@ -52,17 +53,17 @@ class Rosbag2CPPGetServiceInfoTest
   void SetUp() override
   {
     auto bag_name = get_test_name() + "_" + GetParam();
-    root_bag_path_ = rcpputils::fs::path(temporary_dir_path_) / bag_name;
+    root_bag_path_ = std::filesystem::path(temporary_dir_path_) / bag_name;
 
     // Clean up potentially leftover bag files.
     // There may be leftovers if the system reallocates a temp directory
     // used by a previous test execution and the test did not have a clean exit.
-    rcpputils::fs::remove_all(root_bag_path_);
+    std::filesystem::remove_all(root_bag_path_);
   }
 
   void TearDown() override
   {
-    rcpputils::fs::remove_all(root_bag_path_);
+    std::filesystem::remove_all(root_bag_path_);
   }
 
   static void SetUpTestCase()
@@ -116,7 +117,7 @@ class Rosbag2CPPGetServiceInfoTest
 
   std::string get_bag_path_str() const
   {
-    return root_bag_path_.string();
+    return root_bag_path_.generic_string();
   }
 
   bool wait_for_subscriptions(
@@ -142,7 +143,7 @@ class Rosbag2CPPGetServiceInfoTest
   }
 
   // relative path to the root of the bag file.
-  rcpputils::fs::path root_bag_path_;
+  std::filesystem::path root_bag_path_;
   std::future<void> node_spinner_future_;
   std::atomic_bool exit_from_node_spinner_{false};
 };