RFC: Make HE games use the target name in all save files

As is our current policy, this updates all HE save games to make sure the target name is always part of the save file name now. Older saves will be checked for loading still, so compatibility is kept.

In cases with games that have a save file name (before the extension) that match the game id, it will be replaced by the target name. In other cases, the target name will just be prepended in front of the full save file name.

This also fixes Backyard Football and Backyard Soccer which previously were broken because the save names were incorrectly made into the same name for multiple files.

I've tested a lot of games, but I wasn't able to test all of them.