Support nested conditions in custom rule

[9albi]

Problem

It's not possible to have composite rule within custom rule due to Terraform SDK limitation (nested datastructure as a schema is not supported)
Its possible to create a nested custom rule with api (in json)

// custom rule configuration json
"rules": [
        {
            "conditions": {
                "any": [
                    {
                        "all": [
                            // condition 1
                        ]
                    },
                    {
                        "all": [
                            // condition 2
                             ,
                           // condition 3
                        ]
                    }
                ]
            },
            // event 
        }
    ]

This rule cannot be translated directly into HCL conformity_custom_rule rules block.

Proposal

One way of solving this would be to:

• remove the operation from the rules attributes
• conditions type is string(validated as a json) that can be generated
• passthrough the value of conditions to api request payload without extra processing

// conformity_custom_rule
  rules {
    event_type = ""
    conditions = jsonencode(
        {
          any = [{
            all = [
              {
                fact     = ""
                operator = ""
                value    = ""
              }
            ]
            },
            {
              all = [
                {
                  fact     = ""
                  operator = ""
                  value    = ""
                },
                {
                  fact     = ""
                  operator = ""
                  value    = ""
                }
              ]
          }]
        }
      )
  }

I don't hold this for the best solution but I would still like to hear your opinion