Feature Requests - 1. VMSS flexible orchestration model and 2. Ubuntu 22.04

[o-l-a-v]

Two feature requests:

1. Change VMSS orchestration model from Uniform to Flexible. For performance gains (in scaling), and reliability.

• https://learn.microsoft.com/en-us/azure/virtual-machine-scale-sets/flexible-virtual-machine-scale-sets-migration-resources

2. Update OS image to 22.04 LTS, as 18.04 LTS is EOL by the end of May 2023.

• https://ubuntu.com/blog/ubuntu-18-04-eol-for-devices