[BUG] For `oneOf` in open api declaration file, Kotlin generator created data class with empty parameter

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

In case of oneOf in open api declaration file. The generated code is containing data class with empty parameter for Kotlin generator.

import ccs.model.AccountIdByFacilityConfiguration
import ccs.model.AccountIdByServiceConfiguration

import kotlinx.serialization.Serializable
import kotlinx.serialization.SerialName
import kotlinx.serialization.Contextual

/**
 * 
 *
 */
@Serializable

data class CarrierContractBaseAccountIdConfigurationAccountIdConfigurations (
 // Must have at least parameter for primary constructor.
)

openapi-generator version

7.0.0

OpenAPI declaration file content or url

account_id_configurations:
  oneOf:
    - type: array
      description: Account Id configurations for delivery.
      items:
        $ref: '#/components/schemas/AccountIdByServiceConfiguration'
    - type: array
      description: Account Id configurations for delivery.
      items:
        $ref: '#/components/schemas/AccountIdByFacilityConfiguration'

Generation Details

./gradlew assemble

Steps to reproduce

Related issues/PRs

Suggest a fix

Start by reproducing the issue with the supplied OpenAPI schema, focusing on the Kotlin generator and its handling of the account_id_configurations oneOf declaration. Done means the schema no longer produces the shown Kotlin data class with an empty primary constructor, with the resulting generated model behavior verified.