Fix MsSQL failing on long list of providers. (#25338)
Fix MsSQL failing on long list of providers. (#25338)

The #25301 fixed too long names for files in case of long list
of providers but there is one more place it needs to be fixed -
in the volume name of MsSQL tests.
nathanielvarona/airflow,apache/airflow,apache/airflow,nathanielvarona/airflow,cfei18/incubator-airflow,nathanielvarona/airflow,apache/airflow,cfei18/incubator-airflow,nathanielvarona/airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,apache/airflow,cfei18/incubator-airflow,nathanielvarona/airflow,apache/airflow,cfei18/incubator-airflow,nathanielvarona/airflow,apache/airflow