Dal/Scoru: Enable rollup node to call RPCs of Dal nodes (Cloned from !6048)

Context

this MR contains the same commits of !6048 (merged), which was accidentally marked as merged by gitlab when trying to invert its order with the parent MR !6033 (merged). This MR is part of #3166 (closed) and is a prerequisite for !6174 (merged)

Manually testing the MR

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR