feat: add archives.jenkins.io VM

[dduportal]

First step of jenkins-infra/helpdesk#3760, this PR creates a new VM to host archives.jenkins.io in the DigitalOcean cloud.

As per jenkins-infra/helpdesk#3760 (comment), the following resources are declared:

• VM (s-2vcpus-2Gb) at $18 / month
• SSH key for the VM
• firewall (to protect from unwanted SSH except my public IP until the VM is fully provisioned)
• datadisk of 700 Gb attached to the VM at $70 / month

(edit)
💡 Notes:

• No DNS record yet: I want to test the VM initialization ((we never did a fully automated VM in DO with terraform + puppet)
• IPv6 is enabled

[dduportal]

Plan: 5 to add, 0 to change, 0 to destroy. as expected

[dduportal]

Post-deploy: volume creation failed with the following error:

 │ Error: Error creating Volume: POST https://api.digitalocean.com/v2/volumes: 422 (request "41ff5887-b58d-4025-a30a-40e4bfd58e1e") failed to create volume: invalid volume name. names must be lowercase and alphanumeric

Incoming PR