Terraform config exports empty object for validate_additional_rrs

[peterschretlen]

What happened:

When exporting the terraform configuration for a DNS check, it contains empty objects for validate_additional_rrs, which fails when trying to import it into terraform. Example export configuration:

      "dns_test_grafana_com": {
        "job": "dns test",
        "target": "grafana.com",
        "enabled": true,
        "probes": [
          1
        ],
        "labels": {},
        "settings": {
          "dns": {
            "ip_version": "V4",
            "server": "dns.google",
            "port": 53,
            "record_type": "A",
            "protocol": "UDP",
            "valid_r_codes": [
              "NOERROR"
            ],
            "validate_answer_rrs": {},
            "validate_authority_rrs": {},
            "validate_additional_rrs": {}
          }
        }
      }
    },

What you expected to happen:

Either the validate_additional_rrs should be empty, or the terraform provider should support importing an empty object.