Debugger/Memory: Add support for address spaces

Different address spaces can be chosen in the memory view panel.
 * Effective (or virtual): Probably the view people mostly want. Address
   translation goes through MMU.
 * Auxiliary: ARAM address space. Does not display anything in Wii mode.
 * Physical: Physical address space. Only supports mem1 and mem2 (wii
   mode) so far.

Source/Core/Core/PowerPC/MMU.cpp

@@ -1302,4 +1302,14 @@ static TranslateAddressResult TranslateAddress(u32 address)
   return TranslatePageAddress(address, flag);
 }
 
-}  // namespace
+std::optional<u32> GetTranslatedAddress(u32 address)
+{
+  auto result = TranslateAddress<XCheckTLBFlag::NoException>(address);
+  if (!result.Success())
+  {
+    return std::nullopt;
+  }
+  return std::optional<u32>(result.address);
+}
+
+}  // namespace PowerPC