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

* [terraform] use modern day equinix metal provider

* [CI] ensure packet job tests metal

contrib/terraform/metal/sample-inventory/cluster.tfvars

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+# your Kubernetes cluster name here
+cluster_name = "mycluster"
+
+# Your Equinix Metal project ID. See hhttps://metal.equinix.com/developers/docs/accounts/
+metal_project_id = "Example-API-Token"
+
+# The public SSH key to be uploaded into authorized_keys in bare metal Equinix Metal nodes provisioned
+# leave this value blank if the public key is already setup in the Equinix Metal project
+# Terraform will complain if the public key is setup in Equinix Metal
+public_key_path = "~/.ssh/id_rsa.pub"
+
+# cluster location
+facility = "ewr1"
+
+# standalone etcds
+number_of_etcd = 0
+
+plan_etcd = "t1.small.x86"
+
+# masters
+number_of_k8s_masters = 1
+
+number_of_k8s_masters_no_etcd = 0
+
+plan_k8s_masters = "t1.small.x86"
+
+plan_k8s_masters_no_etcd = "t1.small.x86"
+
+# nodes
+number_of_k8s_nodes = 2
+
+plan_k8s_nodes = "t1.small.x86"

contrib/terraform/metal/sample-inventory/group_vars

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+../../../../inventory/sample/group_vars