Sunstone fetch datastore drivers from oned.conf

[vichansson]

Description
Sunstone currently hardcodes in the different DS driver options instead of fetching them directly from oned.conf

Use case
Make the DS driver selection dynamic

Interface Changes
No interface changes necessary, only add parsing of oned.conf ds drivers section. The datastore creation dialog is sufficient as is.

Additional Context

Progress Status

• Code committed
• Testing - QA
• Documentation (Release notes - resolved issues, compatibility, known issues)