[BUG][JAVA] Upgrading java-camel generator from version 7.8.0 to 7.9.0 breaks processing of oneOf / anyOf definitions

Description

We upgraded from version 7.8.0 to 7.9.0 and found that changes between these versions break the java-camel generator's processing of the oneOf/anyOf definitions.

For example, the following schema generates proper code with version 7.8.0, but the generator version 7.9.0 creates a class with no fields. We are using version 3.0.3 of the OpenAPI spec.

"Request": {
      "type": "object",
      "properties": {
        "referenceNumber": {"type": "string", "nullable": true},
        "documentNumber": { "type": "string", "nullable": true},
        "stockNumber": {"type": "string", "nullable": true}
      },
      "oneOf": [
        {
          "required" : [ "referenceNumber" ]
        },
        {
          "anyOf": [
            {
              "required": [ "documentNumber" ]
            },
            {
              "required": [ "stockNumber" ]
            }
          ]
        }
      ]
    }

openapi-generator version

version 7.9.0 of the java-camel generator

OpenAPI declaration file content or url

The full test project including the OpenAPI spec and the generators configuration can be found at
https://github.com/kulon/code-samples/tree/main/openapi-generator-sample

Start with the linked openapi-generator-sample project and reproduce its java-camel output using generator versions 7.8.0 and 7.9.0. Trace how the nested oneOf/anyOf schema is processed and compare the generated Request class; done means the 7.9.0 output preserves the expected fields.