Core: move output file name logic into core (#1066)

* move output file name logic into core

I see the same logic with small variations in each different world implementation.
It seems to me, it would be better in the core to keep it consistent.

* missed a few

* remove review comment

* + smw

* double quote strings

Co-authored-by: black-sliver <59490463+black-sliver@users.noreply.github.com>

* revert change to DS3 output file name

Co-authored-by: black-sliver <59490463+black-sliver@users.noreply.github.com>

BaseClasses.py

@@ -300,6 +300,13 @@ class MultiWorld():
     def get_file_safe_player_name(self, player: int) -> str:
         return ''.join(c for c in self.get_player_name(player) if c not in '<>:"/\\|?*')
 
+    def get_out_file_name_base(self, player: int) -> str:
+        """ the base name (without file extension) for each player's output file for a seed """
+        return f"AP_{self.seed_name}_P{player}" \
+            + (f"_{self.get_file_safe_player_name(player).replace(' ', '_')}"
+               if (self.player_name[player] != f"Player{player}")
+               else '')
+
     def initialize_regions(self, regions=None):
         for region in regions if regions else self.regions:
             region.world = self