native-image compilation, disable member cache

[danthe1st]

This PR is in preparation for relocating the bot / reducing the resources required by the bot.

Changes

• Use GraalVM's native image tool to generate Dockerfiles. This reduces the amount of resources necessary to run the bot.
  • This introduces a closed world assumption meaning all resources and classes used by reflection, JNI or similar mechanisms need to be specified at compile-time. These hints are specified in a class named RuntimeHintsConfiguration and a file named jni-config.json for JNI hints (necessary for Swing/plotting)
• Disable JDA's member caching as storing member information for 25k members unnecessarily uses up memory.
  • This requires using retrieve... instead of get operations and getUser instead of getMember (where Discord doesn't provide member information) in some places
  • I used complete() in plotting-related logic but that is executed in the asyncPool so that shouldn't cause any issues.
  • Since members are no longer cached, the users with the QOTW champion role cannot be obtained easily any more. The current QOTW champions are now stored in the DB.
• Update Spring (Boot)
• bugfixes
  • The thanking system didn't actually thank the last user for each post because that button isn't disabled at that point
  • fix an issue with the serverlock
  • /tag-admin edit had an unnecessary .deferReply() that caused exceptions. This has been removed.
  • The metrics updater was not reliably registered
• remove unnecessary DB pooling logs
• Remove the spam links file since that's loaded automatically

Progress

• explain the changes here (including docs how to build it)
• remove first commit because it's from another PR, squash
• use -O3
• properly test functionality
  • all commands including autocomplete
  • other systems like help, automod and QOTW, webhook things, API, etc.
  • ensure other current PRs work
• ensure AJP is working with the API site
• run it as a systemd service
• automatically create backups of data
• actually replace bot keeping the config and DB
  • update config including bot owners and AJP address
• redirect API to new location (via AJP)
• run QOTW champion migration
  • ensure current QOTW champions are in DB
• Change Docker Hub repo and update credentials

Other things noticed:

/db-admin quick-migrate doesn't use transactions properly. This can be implemented in a future PR.

not tested:

Search the web (no token):
If that doesn't work, we can still fix that in the future.

[danthe1st]

We aren't using AJP any more.