Add deaccessioned reason to DatasetVersionsSummary

Related to https://github.com/IQSS/dataverse/pull/11354, the api endpoint added a {deaccession: {reason: string, url: string }} into the version summary, so the model should be changed accordingly to get the deaccession reason

Front end issue: https://github.com/IQSS/dataverse-frontend/issues/656, We are missing showing the deaccession reason in the Dataset page.