Refactor inheritance in armem/core

• Remove common base classes and virtual inheritance
• Move constructors and operators to base classes
• Add tests for copy/move constructors and operators

added module::armem refactor labels

added 3 commits

• 0d934b0f - Remove unnecessary overrides of copy(), add tests for checking whether copy() exists
• 3d8426c8 - Fix ArMemGuiTest
• fe502934 - Fix test

Compare with previous version

mentioned in commit 65c1c0be

merged