Migrate G2S to V2 Account

[averyniceday]

Best effort - by the end of this, decide if we're gonna migrate this at all

g2s server is not running alignments for new proteins / new structures. That functionality has been disconnected since 2020!.

This server also needs some updates. One update applied for connectivity to mysql8 already. (mysql-data-connector). But we should ideally migrate this code to java21 / spring boot 3 / springframework 5 so that it is parallel to our other java codebases.

Also, this server has nat forwarding rules running in iptables. These must be saved on shutdown and restored on startup.

A startup script to start the web application on system startup should also be added in /etc/rc.d/rc3.d/pdb-annotation .. so that it autostarts on system reboots.

• Add documentation in confluence