Add input for tournament beatmap ids submission

[hburn7]

Depends on osu-tournament-rating/otr-api#438

Overview

Users should be able to submit an (optional) list of beatmap ids on the submit page.

Tasks

• Underneath "Match links", have another input field (of the same size) for "Beatmap Links"
  • Add a ? that, when hovering, says "A list of beatmap ids or URLs which were pooled in the tournament, separated by a new line"
  • Strip the beatmap id from the submission (for example, https://osu.ppy.sh/beatmapsets/38426#osu/123120 is converted to 123120)
  • Create a list of these ids and add them to the POST body as follows: beatmapIds: <list>
  • Remove duplicate IDs