Linting validates script task support for 8.2+

[barmac]

• For Camunda 8.2+, require to set either script or task headers on ScriptTask
• For previous versions, disallow script usage

[barmac]

This will take a bit more time than expected because I need to refactor called-decision-or-task-definition rule. I won't change it to called-decision-or-task-definition-or-script as that would only grow the tech debt but rather abstract away the "one of extensions is required" rule.

[barmac]

So there will be two separate rule types:

1. Extension must be present.
2. Extension must be correctly configured.

[barmac]

Another idea: make it work quickly today and make it right later this week.

[barmac]

A sketch of implementation rule config:

const config = {
  '1.0': {
    'bpmn:ServiceTask': [ TASK_DEFINITION ]
  },
  '1.1':{
    ...config['1.0'],
    'bpmn:BusinessRuleTask': [ TASK_DEFINITION ],
    'bpmn:ScriptTask': [ TASK_DEFINITION ],
    'bpmn:SendTask': [ TASK_DEFINITION ]
  },
  '1.2': {
    ...config['1.1'],
    'bpmn:IntermediateThrowEvent': {
      'eventDefinitions': {
        'bpmn:MessageEventDefinition': [ TASK_DEFINITION ]
      }
    }
  },
  '1.3': {
    ...config['1.3'],
    'bpmn:BusinessRuleTask': [ CALLED_DECISION, TASK_DEFINITION ]
  },
  '8.0': config['1.3'],
  '8.1': config['8.0'],
  '8.2': config['8.1']
};

[barmac]

@philippfromme pointed out that this sketch implies we cannot have smart error messages like "zeebe:CalledDecision is only supported in Zeebe 1.3".