Separation of core and V-SUM-specific utilities

[HeikoKlare]

This PR prepares for the separation of change core functionality and V-SUM-specific functionality by separating the commonly used utilities. To this end, it does the following:

• Removes obsolete utilities from the tools.vitruv.framework.util projects and moves the remaining ones to projects they belong to.
• Separates the tools.vitruv.testutils project into two, one containing basic utilities without specific dependencies and one for V-SUM-specific utils.
• Replaces plugin dependencies to tools.vitruv.framework.util with fine-grained dependencies. By now, tools.vitruv.framework.util reexported several bundles, such that almost all projects using Vitruv depended on them, even if they don't need them.
• Splits the tools.vitruv.testutils.feature into one for the change core and a new feature for V-SUM-specific utils.
• Updates the dependencies of all features.

Requires updates of DSLs (see vitruv-tools/Vitruv-DSLs#21) and CBSE domains (see vitruv-tools/Vitruv-Domains-ComponentBasedSystems#120) and applications (see vitruv-tools/Vitruv-Applications-ComponentBasedSystems#195).

[JanWittler]

bundles/testutils/tools.vitruv.testutils.domains/.project should be removed too