QDS-13458 New Android UI and backend

This MR brings the following changes;

• remove: project caching
• remove: Design Viewer integration
• remove: multiple Design Studio support
• remove: the pairing step when adding to the Design Studio
• fix: a couple of bug fixes here and there
• tests: tests are updated accordingly
• chore: update to Qt 6.7.3
• chore: update QtQuickDesigner Components