Modernize std::any_of with ranges

In WiimoteReal.cpp, JitRegCache.cpp, lambda predicates were replaced by pointers to member functions because ranges algorithms are able invoke those.

In ConvertDialog.cpp, the `std::mem_fn` helper was removed because ranges algorithms are able to handle pointers to member functions as predicates.

Source/Core/Common/FileSearch.cpp

@@ -41,7 +41,7 @@ std::vector<std::string> DoFileSearch(const std::vector<std::string>& directorie
   // N.B. This avoids doing any copies
   auto ext_matches = [&native_exts](const fs::path& path) {
     const std::basic_string_view<fs::path::value_type> native_path = path.native();
-    return std::any_of(native_exts.cbegin(), native_exts.cend(), [&native_path](const auto& ext) {
+    return std::ranges::any_of(native_exts, [&native_path](const auto& ext) {
       const auto compare_len = ext.native().length();
       if (native_path.length() < compare_len)
         return false;