[Feature]- Add more functions at collection level

[clun]

The Http only nature of Data API allows some commands with the cli.

astra db clear-collection <db> --collection <collection>
astra db count-documents <db> --collection <collection>
astra db describe-collection <db> --collection <collection>
astra db backup-collection <db> --collection <collection>  --file <file>
astra db restore-collection <db> --collection <collection>  --file <file>