Prepare release (#651)

# Description
<!--
* Prefix: the title with the component name being changed. Add a short
and self describing sentence to ease the review
* Please add a few lines providing context and describing the change
* Please self comment changes whenever applicable to help with the
review process
* Please keep the checklist as part of the PR. Tick what applies to this
change.
-->

## Checklist
(For exoscale contributors)

* [x] Changelog updated (under *Unreleased* block)
* [ ] Testing

## Testing

<!--
Describe the tests you did
-->

---------

dbaas external integrations

dbaas: datadog settings, instance:protection flag

dbaas: endpoint commands update