Co-authored-by: toziegler

Replace the outdated terrafrom-inventory plugin with the Ansible
Provider and the Terraform Ansible-Collection
Add a new variable to deploy instances as AWS spot instances

Co-authored-by: toziegler
When deploying AWS instances, with every re-boot the label of NVMe
devices changes. E.g., `/dev/nvme1n1`, `/dev/nvme0n1`
Hence, hard-coding the disk labels leads to failed deployments when,
e.g., `/dev/nvme1n1` is used as boot disk.
By discovering storage devices with ansible we can dynamically select
available storage devices for pulsar/bookkeeper

Co-authored-by: toziegler
When network connectivity is slow, uploading the benchmark code to nodes
via ansible takes long and is not required if the step has been
performed before. By splitting the copy and rename step and using
`creates` we can prevent multiple (slow) uploads.

Co-authored-by: toziegler

For long running benchmarks on-demand instances is a more meaningful
default value