Migration for Boost 1.85

Boost 1.85 removed some deprecated code in filesystem module which is
still used in columnstore:

- The boost/filesystem/convenience.hpp was removed but columnstore does
  not use any functionality from that file except indirect includes.
  Therefore this include is removed or replaced with more general
  boost/filesystem.hpp. The convenience.hpp header file was deprecated
  in filesystem V3 introduced in Boost 1.46.0.

- `normalize` method was removed and users are suggested to replace it
  with `lexically_normal` method, which was introduced in Boost 1.60.0.
  Original `normalize` call is preserved for backward compatibility with
  old Boost version, however`, `lexically_normal` method is preferably
  used with Boost 1.60.0 and newer.

- The `copy_option` was removed in favor of `copy_options` (note the
  trailing 's'), but enum values were renamed. Namely, `fail_if_exists`
  is replaced with `none` and `overwrite_if_exists` is replaced with
  `overwrite_existing`. The `copy_options` was introduced in Boost
  1.74.0.

  New form is used instead, but a backward compatibility layer for Boost
  1.73.0 and older was introduced in boost_copy_options_compat.hpp file.
  This solution seems to be less awkward than using multiple #if #else
  #endif blocks in source code.

utils/configcpp/configcpp.cpp

@@ -54,6 +54,7 @@ namespace fs = boost::filesystem;
 
 #include "configcpp.h"
 
+#include "boost_copy_options_compat.hpp"
 #include "exceptclasses.h"
 #include "installdir.h"
 #ifdef _MSC_VER
@@ -401,7 +402,7 @@ void Config::writeConfig(const string& configFile) const
       {
       }
 
-      fs::copy_file(dcf, scft, fs::copy_option::overwrite_if_exists);
+      fs::copy_file(dcf, scft, fs::copy_options::overwrite_existing);
 
       try
       {