bosch-transfer/22-02-08-update

What: Transfer 22-02-08 commit from Bosch.

Contains the following improvements:

• All utils methods now work with references and do not require shared_ptrs any more (https://gitlab.eclipse.org/eclipse/simopenpass/yase/-/issues/1)
• Fix last GCC warnings (Now all GCC warnings and clang sanitizers are satisfied). This is checked internally in our pipeline for now on
• Extensions of a node are unique now (https://gitlab.eclipse.org/eclipse/simopenpass/yase/-/issues/2)
• Codespell: Fix all errors. This is checked internally in our pipeline for now on
• Fix sequence - Is now also valid to have no children
• Extend composites with more convenience getter methods

@rparisha2 Here is the (API changing) PR with the change towards util functions with references. You may need to update your Pr as well.