Update Connection Endpoint Cleanup

[alovew]

There are two endpoints to update a connection. WebBackendConnectionHandler#webBackendUpdateConnectionNew and WebBackendConnectionHandler#webBackendUpdateConnection.

We launched Per Stream state using the New endpoint, but we should clean this up by changing the name back to the original and removing the original endpoint.

This will involve:

• Changing the WebBackendConnectionHandler so there is only one endpoint and updating those tests
• Updating the OpenApi to remove the UpdateNew endpoint and just use the Update endpoint
• Remove the WithRefreshedCatalog boolean parameter from WebBackendConnectionUpdate since that parameter is no longer used
• Update the front end to call the update endpoint instead of updateNew
• Updating integration tests that are currently calling UpdateNew