fix[next]: DaCe scalar argument in stencil closure

[edopao]

Description

Add support for argument of stencil closure with ScalarType. Baseline only supported FieldType arguments.

Requirements

• All fixes and/or new features come with corresponding tests.
• Important design decisions have been documented in the approriate ADR inside the docs/development/ADRs/ folder.

If this PR contains code authored by new contributors please make sure:

• All the authors are covered by a valid contributor assignment agreement provided to ETH Zurich and signed by the employer if needed.
• The PR contains an updated version of the AUTHORS.md file adding the names of all the new contributors.

[petiaccja]

The PR is pretty straightforward, we've already discussed the only questionable part, so it's approved.