Rework ReflectionUtil versioning

[virustotalop]

1.20.6 paper no longer remaps CraftBukkit classes which caused the plugin to fail on load. So we check the length of the parsed package CraftBukkit server class name. We also do a try catch for getting CraftBukkit classes so we can get support relocated and non-relocated classes.

Tested with this script on 1.20.6 and 1.20.4

import pyspigot as ps
from dev.magicmq.pyspigot.util import ReflectionUtils

def test_command(sender, label, args):
    sender.sendMessage('Hi!')
    craft_server = ReflectionUtils.getCraftBukkitClass("CraftServer")
    sender.sendMessage(str(craft_server))
    return True

registered_command = ps.command.registerCommand(test_command, 'test')

Results 1.20.6 1.20.4