[Task] Switch EC2 machine image to Ubuntu 22.04 LTS

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Task Description

Right now, we are using Amazon Linux 2 as our main EC2 image.
However:

1. Some games require more modern libraries (ex: Minecraft Bedrock server requires GLIBC_2.27)
2. LinuxGSM (Linux Game Server Managers) has better support to Ubuntu
3. It's (probably) easier to install SteamCMD on Ubuntu with apt package manager support

Thus, the main goals for this task are

• Switch the EC2 base image to Ubuntu 22.04 LTS
• Update the default advanced configs and instance-init.ts if needed

Here are some useful resources that can be helpful:

• Code section that define our machine image
• Working CDK code that can spin up an Ubuntu machine, I think

Testing

• Deploy and ensure all the features still work
• Deploy to make sure the Ubuntu image at least works with the following regions:
  • US West
  • EU
  • Asia East