Feat: Issue #1214: Add support for seed rolling

[Sashwat-K]

Hello Team,
While performing seed rolling with the following Contract through Terraform, the terraform apply failed.

{
  "env" : {
    "type" : "env",
    "logging" : {
      "logDNA" : {
        "ingestionKey" : var.logdna_ingestion_key,
        "hostname" : var.logdna_ingestion_hostname,
        "port": 6514
      }
    },  
    "volumes": {
      "datavolume": {
        "seed": "testtest111",
        "previousSeed": "testtest11"
      }
    }
  },
  "workload" : {
    "type" : "workload",
    "compose" : {
      "archive" : hpcr_tgz.contract.rendered
    },
    "volumes": {
      "datavolume": {
        "filesystem": "ext4",
        "mount": "/mnt/data",
        "seed": "testtest111",
        "previousSeed": "testtest11"
      }
    }
  }
}

The error was the following:-

Plan: 0 to add, 5 to change, 0 to destroy.
╷
│ Error: /workload/volumes/datavolume: {"filesystem":"ext4"... additional properties are not allowed
│ 
│   with hpcr_contract_encrypted.contract,
│   on terraform.tf line 144, in resource "hpcr_contract_encrypted" "contract":
│  144:   contract = local.contract
│ 
╵
╷
│ Error: /env/volumes/datavolume: {"previousSeed":"tes... did not match any of the specified OneOf schemas
│ 
│   with hpcr_contract_encrypted.contract,
│   on terraform.tf line 144, in resource "hpcr_contract_encrypted" "contract":
│  144:   contract = local.contract
│ 
╵

This PR resolves this issue.

[Sashwat-K]

LogDNA output for seed rolling

Sep 25 18:38:28 sashwatk-hpcr-seedrolling-compose-vsi hpcr-disk-mount info No key available with this passphrase. 
Sep 25 18:38:28 sashwatk-hpcr-seedrolling-compose-vsi hpcr-disk-mount debug Error while opening the LUKS layer for disk /dev/vdd2 
Sep 25 18:38:30 sashwatk-hpcr-seedrolling-compose-vsi hpcr-disk-mount info No key available with this passphrase. 
Sep 25 18:38:30 sashwatk-hpcr-seedrolling-compose-vsi hpcr-disk-mount debug Error while opening the LUKS layer for disk /dev/vdd2 
Sep 25 18:38:32 sashwatk-hpcr-seedrolling-compose-vsi hpcr-disk-mount info Disk /dev/vdd2 is encrypted with env and workload seeds 
Sep 25 18:38:32 sashwatk-hpcr-seedrolling-compose-vsi hpcr-disk-mount info HPL07012I: Seeds have been changed, modifying the LUKS passphrase with new seeds 
Sep 25 18:38:33 sashwatk-hpcr-seedrolling-compose-vsi hpcr-disk-mount info Received LUKS password change request for /dev/vdd2 
Sep 25 18:38:33 sashwatk-hpcr-seedrolling-compose-vsi hpcr-disk-mount info Data Volume to be encrypted is /dev/vdd2 

[CarstenLeue]

Closing in favour of #48