Deleted users' scores are not shown on leaderboard

[peppy]

As pointed out on discord

https://old.ppy.sh/b/3455739
https://osu.ppy.sh/beatmapsets/1648596#osu/3455739

I believe that this was relying on the hidden flag in the scores table to work correctly. We not longer have that flag so I'm not sure if/how we can maintain this logic (ie we can't discern between a deleted user with cheated scores and a deleted user with legitimate scores).

[nanaya]

a reminder about this in the original issue (I haven't confirmed)

Also leads to the "<player> achieved rank #N on <map>" being incorrect as in the following example, since the real rank 1 play is from a deleted user.

map in incorrect rank achieved example:
https://osu.ppy.sh/beatmapsets/800102#mania/1679790