Autogenerate public key

## In what area(s)?
https://github.com/Azure/cyclecloud-slurm-workspace/blob/5eb50c8dcc2d6c827fb4d9616e3e4072d7813d92/bicep/publicKey.bicep#L4-L10

## Describe the feature
Just wondering if the auto-generate SSH public key feature is coming anytime soon?
It’d be super helpful to have this working, especially for smoother deployments without needing to pre-create keys manually.

Start with bicep/publicKey.bicep at lines 4-10 and trace how the SSH public key is supplied during deployment. Done means deployments can generate the public key automatically instead of requiring a pre-created key, with the resulting behavior verified through the deployment path described by the issue.

Written by the indexing model from the issue text.