Remove ii-nvidia-a100-40gb flavor and pricing from VM flavors

[msdisme]

Motivation

To ensure some a100 devices are available for development work and courses, we should remove them from https://nerc-project.github.io/nerc-docs/openstack/create-and-connect-to-the-VM/flavors/#ii-nvidia-a100-40gb

Completion criteria

• reconfirmed
• documentation changed

Description

• [ ] reconfirm with Milson, Wayne, Scott that this will not cause problems (discussed in a weekly operation meeting)
  • [ ] remove entirely or add severely limited availability
• [ ] if agreed update documentation either to say severely limited availability or just remove entirely