Support Environment Output configuration type

[tomer-landesman]

Is your feature request related to a problem? Please describe.
Users need a way to configure new configuration variable with the Environment Output type

Describe the solution you'd like
create a new resource called env0_environment_output_configuration_variable.

this new resource is a subset of env0_configuration_variable, with modifications

Allowed scopes: Project, Environment, Workflow, Deployment

it should use the following structure

resource `env0_environment_output_configuration_variable` {
	# required 
	name = string 
	output_environment_id = string
	output_sub_environment_alias = string
	output_name = string
	scope_environment_id = string
	scope_project_id = string
	
   #optional
	description = string
	is_read_only = bool
	is_required = bool
	type = 'environment' or 'terraform'
}

some of the required fields are mutually exclusive:
output_environment_id OR output_sub_environment_alias must be provided

scope_environment_id OR scope_project_id must be provided

an example request when output_environment_id is provided on project scope:

	{
  "scopeId": "6b1b0897-5322-48cd-98b7-5e11766f54c8",
  "projectId": "6b1b0897-5322-48cd-98b7-5e11766f54c8",
  "schema": {
    "type": "string",
    "format": "ENVIRONMENT_OUTPUT"
  },
  "isRequired": false,
  "isSensitive": false,
  "createdAt": "2024-05-01T11:19:51.091Z",
  "scope": "PROJECT",
  "name": "lala",
  "value": "{\"environmentId\":\"d5a18b6c-db18-4b0c-ae16-8089402d471a\",\"outputName\":\"bool\"}",
  "organizationId": "bd12a04a-b051-4f51-9a8a-8a32ac198802",
  "userId": "google-oauth2|108915661606437380673",
  "updatedAt": "2024-05-06T10:39:35.806Z",
  "id": "c60b9a7c-b1c9-4372-ac1b-4b854fe518da",
  "isReadonly": false,
  "type": 1,
  "overwrites": null
}

an example request when output_sub_environment_alias is provided on workflow deployment scope:

{
  "name": "lala",
  "value": "{\"subEnvironmentAlias\":\"alias1\",\"outputName\":\"my-stuff\"}",
  "description": "",
  "isSensitive": false,
  "isRequired": false,
  "isReadonly": false,
  "regex": "",
  "projectId": "6b1b0897-5322-48cd-98b7-5e11766f54c8",
  "schema": {
    "type": "string",
    "format": "ENVIRONMENT_OUTPUT"
  },
  "createdAt": "2024-05-01T11:19:51.091Z",
  "scope": "ENVIRONMENT",
  "organizationId": "bd12a04a-b051-4f51-9a8a-8a32ac198802",
  "userId": "google-oauth2|108915661606437380673",
  "updatedAt": "2024-05-06T10:39:35.806Z",
  "type": 1,
}

note that as same as regular configuration variable, it can be also provided via a block on the environment resource

the API should be the exact same as configuration variables, but adapted to match the above examples