Revamp realm picking algorithm, considering archipelago

[pablitar]

Currently, the algorithm for picking realms is the following:

• Get status and calculate latency of all the realms available through DAO (some realms will have the same latency since they belong to the same server)
• Select all the candidates that are healthy and are not full
• Sort them using the following criteria:
  • If latency difference is greater than 1500 ms, use that as the main factor
  • If the latency difference is within 1500 ms, consider the amount of users, and use the score function:
    • The score function prioritizes realms that have users and gives greater scores to those realms that have close to 40% of their main users, and deprioritizes those that are over 80% full. See here: feat: New score function #604
  • If the score is the same, the realms of those catalyst (including all layers) with the least users are prioritized, in order to balance the load.
• Pick the first one

We should adapt this considering that now we don't have layers and we don't have a clear maximum amount of users per catalysts (in practice, it would several tens of thousands)