Support for meta-data in cloudinit

[BlackDark]

Is your feature request related to a problem? Please describe.
Most parts of cloudinit are supported (user-data,network,vendor) but meta data is not support. But it is prepared in the code as I see?

terraform-provider-proxmox/proxmox/virtual_environment_vm_types.go

Line 54 in 7c9505d

MetaVolume *string `json:"meta,omitempty" url:"meta,omitempty"`

Describe the solution you'd like
I think it would be good to also set metadata if required (for example for local-hostname).