Add MongoDB 6.0 for appdb

[emisca]

Add mongodb 6.0 repo and switch to mongosh for ansible tasks if version is 5.0 or 6.0.

Currently by adding only the 6.0 repo the ansible tasks fail with:

fatal: [opsmgr]: FAILED! => {"changed": true, "cmd": "mongo omserver.omansible.int:27017 --quiet --eval \"print(db.getSiblingDB('mmsdbconfig').config.customers.findOne()._id.str)\"", "delta": "0:00:00.450647", "end": "2023-03-22 12:50:59.589072", "msg": "non-zero return code", "rc": 127, "start": "2023-03-22 12:50:59.138425", "stderr": "/bin/sh: mongo: command not found", "stderr_lines": ["/bin/sh: mongo: command not found"], "stdout": "", "stdout_lines": []}

because the old mongo shell is not provided anymore. 5.0 still works as the mongo shell is provided.

[emisca]

The agreed plan is:

• remove repo files older than 4.4 (which don't include mongo-mongosh package)
• make sure to install mongosh package
• switch all the ansible tasks to use mongosh instead of mongo and test them