Update target Cassandra versions for integration tests, support new 5.0.x

CASSANDRA-19292 added support for running integration tests against Cassandra 4.1.x but we still need the ability to run against Cassandra 5.0.x.  As of this writing we need riptano/ccm to manage Cassandra 5.0.x clusters.  The DataStax CI infrastructure, however, uses a private fork of ccm which adds the ability to manage DSE clusters (something riptano/ccm can't do right now).  So we presumably need to do one of the following:

• Port Cassandra 5.0.x support to the private fork
• Port DSE support to riptano/ccm
• Change the build process to install both riptano/ccm and the private fork into distinct venvs and manage accordingly