[UX2.0] Configuration-group creation fails after initial deployment failure

[tzarski0]

Configure the following data model (note that in this data model, we on purpose didn't include some required variables):

resource "sdwan_system_feature_profile" "system1" {
  name        = "system1"
  description = ""
}

resource "sdwan_system_feature_profile" "transport1" {
  name        = "transport1"
  description = ""
}

resource "sdwan_configuration_group" "cg1" {
  description = "configuration group 1"
  devices = [
    {
      deploy = true
      id     = "C8K-172343D2-7380-8B1B-5509-6FCB24AFA689"
      variables = [
        {
          name  = "host_name"
          value = "Edge2"
        }
      ]
    }
  ]
  feature_profiles = [{
    id = sdwan_system_feature_profile.system1.id
  }]
  name     = "cg1"
  solution = "sdwan"
}

This will fail with the below error. This error is expected as we didn't fill some of the required variables:

│ Error: Client Error
│ 
│   with sdwan_configuration_group.cg1,
│   on main.tf line 26, in resource "sdwan_configuration_group" "cg1":
│   26: resource "sdwan_configuration_group" "cg1" {
│ 
│ Failed to configure configuration group device variables (PUT), got error: HTTP Request failed:
│ StatusCode 400, {"error":{"message":"Invalid Json Payload
│ Input","code":"SCHVALID0001","details":"{\"Validation Errors\":{\"Required But Missing
│ Attributes\":[\"pseudo_commit_timer\",\"site_id\",\"system_ip\"]}}","type":"error"}}
╵

Now if you try to trigger the apply again, TF will again try to create this resource and will fail as it already created it in the previous apply:

╷
│ Error: Client Error
│ 
│   with sdwan_configuration_group.cg1,
│   on main.tf line 26, in resource "sdwan_configuration_group" "cg1":
│   26: resource "sdwan_configuration_group" "cg1" {
│ 
│ Failed to configure configuration group (POST), got error: HTTP Request failed: StatusCode 400,
│ {"error":{"message":"Failed to create config group.","code":"CFGRP0001","details":"config group with
│ name 'cg1' already exists","type":"error"}}

This is not expected and should be fixed. If first apply created a config group correctly and attachment failed, then on next TF apply we should just add devices block to existing config group resource and not try to recreate config group again.