Add Support for deleted things in source models

[nathanatstariongroup]

Prerequisites

• I have written a descriptive issue title
• I have verified that I am running the latest version of the DEH-Capella
• I have searched open and closed issues to ensure it has not already been reported

Description

As per version 1.7.0 mapping actions don't do any real deletion of things the only things that are deleted when unlinked are DeploymentLinks and PropertyValue.

There is two categories of elements that could be deleted // marked for deletion.

Mapped Things

The things that have a corresponding mapping configuration. More specifically ElementDefinition/Component, ElementUsage/Part, Requirements and RequirementsSpecifications.

Deletion of these elements could be implemented as follow:

Not Mapped Things

Things that don't have mappingconfiguration but are directly related to mapped things. Such as BinaryRelationships/Traces, Parameter/Property, Parameter/ParameterOverride/PropertyValue, BinaryRelationship/Interfaces, ElementUsages/Ports

Deletion of these elements could be implemented as follow:

Steps to Reproduce

System Configuration

• Capella version:
• Environment (Operating system, version and so on):
• Java version:
• Additional information: