Resolve "External renderer unnecessary memory allocated"

• Related issues: #1135 (closed)
• Requested reviewers:

Reason why this change is needed

• In the external renderer, module handles related to all possible functionalities are allocated regardless of whether the particular functionality is used or not. Consequently, unnecessary memory blocks are allocated for the majority of rendering test cases.

Description of the change

• Memory usage reduction: Allocate only handles that are really needed.

Affected operating points

• All is BE.