[terraform] use modern day equinix metal provider (#8748)

* [terraform] use modern day equinix metal provider

* [CI] ensure packet job tests metal

contrib/terraform/metal/variables.tf

@@ -0,0 +1,57 @@
+variable "cluster_name" {
+  default = "kubespray"
+}
+
+variable "metal_project_id" {
+  description = "Your Equinix Metal project ID. See https://metal.equinix.com/developers/docs/accounts/"
+}
+
+variable "operating_system" {
+  default = "ubuntu_20_04"
+}
+
+variable "public_key_path" {
+  description = "The path of the ssh pub key"
+  default     = "~/.ssh/id_rsa.pub"
+}
+
+variable "billing_cycle" {
+  default = "hourly"
+}
+
+variable "facility" {
+  default = "dfw2"
+}
+
+variable "plan_k8s_masters" {
+  default = "c3.small.x86"
+}
+
+variable "plan_k8s_masters_no_etcd" {
+  default = "c3.small.x86"
+}
+
+variable "plan_etcd" {
+  default = "c3.small.x86"
+}
+
+variable "plan_k8s_nodes" {
+  default = "c3.medium.x86"
+}
+
+variable "number_of_k8s_masters" {
+  default = 1
+}
+
+variable "number_of_k8s_masters_no_etcd" {
+  default = 0
+}
+
+variable "number_of_etcd" {
+  default = 0
+}
+
+variable "number_of_k8s_nodes" {
+  default = 1
+}
+