Re-added Auto-Pruner for full helper roles

[Zabuzard]

#1076 removed the auto-pruner because we thought Discord fixed the underlying issue. But apparently we are running into it again. Just that now the user limit seems to be 250 and not 100.

This reverts the removal and bumps the limit to 250, so that inactive users will be automatically pruned from the role again whenever it approaches the limit fo 250 users.

Config changes

Dont forget while deploying. Adds this to the config:

"helperPruneConfig": {
    "roleFullLimit": 250,
    "roleFullThreshold": 245,
    "pruneMemberAmount": 7,
    "inactivateAfterDays": 90,
    "recentlyJoinedDays": 4
},

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud