Support for v1.28.8 TKR builds

What's New

• Adds support to build Kubernetes 1.28.8 for Photon 5 and Ubuntu 22.04 LTS TKRs.
• Adds support for building Photon 5 images.

What's Changed

• Add Photon-5 support by @vinodnarayana in #81
• Make sure nouveau kernel module is never loaded by @sriramandev in #82
• Bug fixes as listed in #82 (comment)
• Remove support for building 1.25.7 images

New Contributors

• @vinodnarayana made their first contribution in #81

Full Changelog: v0.4.0...v0.5.0