Merge feature/qt6-migration-basis-modules-services into feature/qt6-migration-basis-modules

Resolves 17 conflicts against legacy Qt5 semantics; validates with BUILD_RTI=ON BUILD_GRANTLEE=ON.

qt6-after/qt6-migrated-legatus/forward-declarations/Lts/Services/NotificationManagement/nom_dtc.h

@@ -0,0 +1,7 @@
+#ifndef _STUB_DTC_H
+#define _STUB_DTC_H
+// Stub file for BUILD_GRANTLEE=OFF
+namespace NOM {
+    class Dtc {};
+}
+#endif

qt6-after/qt6-migrated-legatus/forward-declarations/Lts/Services/NotificationManagement/nom_ftc.h

@@ -0,0 +1,7 @@
+#ifndef _STUB_FTC_H
+#define _STUB_FTC_H
+// Stub file for BUILD_GRANTLEE=OFF
+namespace NOM {
+    class Ftc {};
+}
+#endif