Assign top coin ranks for top 5, 10, 20 (No roles for bots)

[Elfshot]

Summary of Changes

Add extra env vars for extra role ids.
Change cron job for adding top 10 coin holders to add/remove top x coin roles

Related Issues

Resolves #462 and #467
Conflicts with PR #470

Steps to Reproduce

• Add new role ids to env
• Add at least 20 users to coin db with some bots
• Trigger cron job
• ensure the top 5, 10, and 20 have their respective roles and bots have no roles

Demonstration of Changes

Top x coin holder images

1-5 have top 5

6-10 have top 10

Before no bot commit, bots steal the position from leaderboards:

After, bots are completely excluded from consideration (this bot would be top 5):

I'll omit the rest of the images.
Position 11-20 have top 20 roles
I, position 21 have no role

[Elfshot]

Latest commit resolves #467

[Fan-Yang-284]

This looks great! Nice job handling the infinite loop as well. Would you mind adding a commit to update the staging vars.json before merging, and then @probro27 or I will update the prod vars.json as well after we create the new roles in the main server.

[probro27]

@Elfshot LGTM! I will check the vars.json in prod and then push the code there. Thanks for working on this :D