Adding citype support for custom cloud config

[patsissons]

Community Note

This is useful for deploying RancherOS which requires configdrive2 for citype

this includes a similar fix to #57 for initialization state diffs

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Release note for CHANGELOG:

adding new type field to the initialization block to specify the citype

see config docs for more details

Example:

resource "proxmox_virtual_environment_vm" "test_vm" {
  # ...

  initialization {
    user_data_file_id = proxmox_virtual_environment_file.test_vm_cloud_config.id
    type = "configdrive2"
  }
}

resource "proxmox_virtual_environment_file" "rancheros_template_cloud_config" {
  # ...
}