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/Debug/Watches.cpp

@@ -79,7 +79,7 @@ void Watches::DisableWatch(std::size_t index)
 
 bool Watches::HasEnabledWatch(u32 address) const
 {
-  return std::any_of(m_watches.begin(), m_watches.end(), [address](const auto& watch) {
+  return std::ranges::any_of(m_watches, [address](const auto& watch) {
     return watch.address == address && watch.is_enabled == Watch::State::Enabled;
   });
 }