Fix the template engine for 'multi-check' type in SPA (drupal/cloud_dashboard)

Problem/Motivation

• For 'multi-check' type form blocks, there are variations in the implementation of property values in entities.
• For example, in some cases, ["1", "2", "3"] is an array of IDs, while in others, foo, bar, foobar is a comma-separated string. Therefore, the template engine should be modified to make the form block compatible with the various cases.

Proposed resolution

• Modify the template engine to accommodate a variety of entities.
• Modify the contents of the template file to match the modified template engine.