Ubuntu 24.04 LTS + Fixes for cloud-init and UEFI boot compatibility

What's Changed

Tested with:

• packer: v1.10.3
• cloud-init: 24.1
• make: 4.4.1

New Ubuntu Distro

• Ubuntu 24.04 (Noble Numbat) LTS 🎊

Fixes

• With Ubuntu 24.04 LTS the UEFI Boot Sequence provides incompatible output that caused builds to break (see #17).
  Now each Distro's cloud-init configuration is in its separate directory to maintain compatibility with older LTS versions
• Fix for wrong cloud-init parameter plain_text_passwd

Full Changelog: v0.4.5...v0.5.0