Project structure: move *Services into control-plane core module

[ndr-brt]

Feature Request

Currently the *Service services are located into the data-management modules so they aren't usable from other extensions.
The idea would be to make them available.

Which Areas Would Be Affected?

data-management, core

Why Is the Feature Desired?

Giving the opportunity to implement different kind of api.

Solution Proposal

Move the Service interfaces to the control-plane spi and the implementation to the control-plane core extension.

Type of Issue

cleanup

Checklist

• assigned appropriate label?
• Do NOT select a milestone or an assignee!

[ndr-brt]

Superseded by #1887