Add example blueprint with persistent save state

[jvilarru]

This is an example blueprint on how to have a persistent statesave disk. Having a persistent disk holding the statesave allows multiple redeployments of the cluster without loosing the state of it.

Submission Checklist

Please take the following actions before submitting this pull request.

• Fork your PR branch from the Toolkit "develop" branch (not main)
• Test all changes with pre-commit in a local branch #
• Confirm that "make tests" passes all tests
• Add or modify unit tests to cover code changes
• Ensure that unit test coverage remains above 80%
• Update all applicable documentation
• Follow Cloud HPC Toolkit Contribution guidelines #

[nick-stroud]

/gcbrun