Enable BOOST_STL_INTERFACES_USE_DEDUCED_THIS on Clang 19 and MSVC 19.41

Clang 19 and MSVC 19.41 both have support for deducing this that is
complete enough to allow the v3 version of this library to work but
not complete enough for the compilers to define
__cpp_explicit_this_parameter. This commit enables the v3 version of
this library on compilers with that version or newer. We make use of
BOOST_CLANG_VERSION here because on AppleClang it should provide the
version of upstream Clang that was used for that release.

include/boost/stl_interfaces/config.hpp

@@ -6,6 +6,9 @@
 #ifndef BOOST_STL_INTERFACES_CONFIG_HPP
 #define BOOST_STL_INTERFACES_CONFIG_HPP
 
+// Included for BOOST_CLANG_VERSION
+#include <boost/config.hpp>
+
 // Included for definition of __cpp_lib_concepts.
 #include <iterator>
 
@@ -17,7 +20,9 @@
 #define BOOST_STL_INTERFACES_USE_CONCEPTS 0
 #endif
 
-#if defined(__cpp_explicit_this_parameter) &&                                  \
+#if (defined(__cpp_explicit_this_parameter) ||                                 \
+     (defined(_MSC_VER) && _MSC_VER >= 1941) ||                                \
+     (defined(BOOST_CLANG_VERSION) && BOOST_CLANG_VERSION >= 190000)) &&       \
     BOOST_STL_INTERFACES_USE_CONCEPTS &&                                       \
     !defined(BOOST_STL_INTERFACES_DISABLE_DEDUCED_THIS)
 #define BOOST_STL_INTERFACES_USE_DEDUCED_THIS 1