[New Resource]: Ethernet Port

[acch]

Adds ability to create ethernet ports (VLAN / LAG).

Closes #304.

Acceptance tests pass:

TF_ACC=1 go test ./internal/provider/networking/network_ethernet_port_resource_test.go -v
=== RUN   TestAccNetworkEthernetPortResource
--- PASS: TestAccNetworkEthernetPortResource (16.33s)
PASS
ok      command-line-arguments  16.338s

Example Terraform Configurations:

// sample LAG with required properties
resource "netapp-ontap_port" "lag" {
  cx_profile_name = ...

  broadcast_domain = {
    ipspace = "Default"
    name    = "bd1"
  }

  node = {
    name = "node1"
  }

  type = "lag"
  lag = {
    distribution_policy = "mac"
    member_ports = [ "e0b", "e0c" ]
    mode = "singlemode"
  }
}

// sample VLAN with required properties
resource "netapp-ontap_port" "vlan" {
  cx_profile_name = ...

  broadcast_domain = {
    ipspace = "Default"
    name    = "bd2"
  }

  node = {
    name = "node1"
  }

  type = "vlan"
  vlan = {
    base_port = "e0a"
    tag       = 100
  }
}