Fix broken references in CDT.setup's working sets

[merks]

No description provided.

[merks]

The setup archiver is complaining about these problems:

FAILED to load https://raw.githubusercontent.com/eclipse-cdt/cdt/main/releng/CDT.setup
ERROR: Unresolved reference '//'cdt.workingsets'/@workingSets[name='CDT%20Native']'. (https://raw.githubusercontent.com/eclipse-cdt/cdt/main/releng/CDT.setup, 308, 1407) 308 308 1407
ERROR: Value 'org.eclipse.oomph.base.impl.BaseFactoryImpl$1@6280fd3c (eClass: org.eclipse.emf.ecore.impl.EClassImpl@57d6fee9 (name: WorkingSet) (instanceClassName: null) (abstract: false, interface: false))' is not legal. (https://raw.githubusercontent.com/eclipse-cdt/cdt/main/releng/CDT.setup, 308, 1407) 308 308 1407
ERROR: Value 'org.eclipse.oomph.base.impl.BaseFactoryImpl$1@6f3701c3 (eClass: org.eclipse.emf.ecore.impl.EClassImpl@57d6fee9 (name: WorkingSet) (instanceClassName: null) (abstract: false, interface: false))' is not legal. (https://raw.githubusercontent.com/eclipse-cdt/cdt/main/releng/CDT.setup, 308, 1407) 308 308 1407
ERROR: Value 'org.eclipse.oomph.base.impl.BaseFactoryImpl$1@5a4a4da3 (eClass: org.eclipse.emf.ecore.impl.EClassImpl@57d6fee9 (name: WorkingSet) (instanceClassName: null) (abstract: false, interface: false))' is not legal. (https://raw.githubusercontent.com/eclipse-cdt/cdt/main/releng/CDT.setup, 308, 1407) 308 308 1407
ERROR: Value 'org.eclipse.oomph.base.impl.BaseFactoryImpl$1@7bb3d463 (eClass: org.eclipse.emf.ecore.impl.EClassImpl@57d6fee9 (name: WorkingSet) (instanceClassName: null) (abstract: false, interface: false))' is not legal. (https://raw.githubusercontent.com/eclipse-cdt/cdt/main/releng/CDT.setup, 308, 1407) 308 308 1407
ERROR: Value 'org.eclipse.oomph.base.impl.BaseFactoryImpl$1@1e3faf34 (eClass: org.eclipse.emf.ecore.impl.EClassImpl@57d6fee9 (name: WorkingSet) (instanceClassName: null) (abstract: false, interface: false))' is not legal. (https://raw.githubusercontent.com/eclipse-cdt/cdt/main/releng/CDT.setup, 308, 1407) 308 308 1407
ERROR: Value 'org.eclipse.oomph.base.impl.BaseFactoryImpl$1@49519c29 (eClass: org.eclipse.emf.ecore.impl.EClassImpl@57d6fee9 (name: WorkingSet) (instanceClassName: null) (abstract: false, interface: false))' is not legal. (https://raw.githubusercontent.com/eclipse-cdt/cdt/main/releng/CDT.setup, 308, 1407) 308 308 1407

[akurtakov]

Merging on behalf of @merks . Not waiting for the build as it will not validate this change.