Setting the `vars` property on the `dog_host` resource to an empty JSON object produces an error

[weaversam8]

If you attempt to create a resource like this:

resource "dog_host" "abc" {
  name = "abc.example.com"
  vars = jsonencode({})
}

Terraform will produce an error like:

╷
│ Error: Provider produced inconsistent result after apply
│ 
│ When applying changes to dog_host.abc, provider "provider[\"registry.terraform.io/relaypro-open/dog\"]" produced an
│ unexpected new value: .vars: was cty.StringVal("{}"), but now null.
│ 
│ This is a bug in the provider, which should be reported in the provider's own issue tracker.
╵

[dgulinobw]

This is a bug, in that the provider returns an error instead of usable information.

vars is not a required field. If vars has no values, simply do not add that field to the host definition.

This host with no vars defined will work:

resource "dog_host" "d123" {
  name = "d123.example.com"
  environment = "*"
  group       = dog_group.dog_test.name
  hostkey     = "1234567890"
  location    = "*"
  provider    = dog.qa
}

Also, the jsonecoding workaround of the lack of dynamic (any) support in terraform can now go away, since in 1.7.0 dynamics are now supported:
https://developer.hashicorp.com/terraform/language/expressions/type-constraints#dynamic-types-the-any-constraint