Add support for MI Cassandra in 2023-09-15

[guanzhousongmicrosoft]

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[guanzhousongmicrosoft]

This PR includes adding support for features below:

1. add --force option for 'az managed-cassandra cluster deallocate' command.
   This allows the user to force deallocate a Production cluster, otherwise the operation will return BadRequestException to stop user deallocate a Production cluster.

2. add --cluster-type option for 'az managed-cassandra cluster update' command.
   This allows the user to change cluster type of a cluster between 'NonProduction' and 'Production'.

3. add '--extensions' option for 'az managed-cassandra cluster update' command.
   This allows user to add or remove extensions of a cluster.

4. add 'isLatestModel' property to return result from 'az managed-cassandra cluster status' command.
   This will indicate if the node has updated to the latest model.