Fix failing translation file import (partial revert of 6304cdc)

Contribution Sponsor: Firestorm (launchfirestorm.com)

CMakeLists.txt

@@ -280,14 +280,8 @@ qt_add_executable(${PROJECT_NAME}
 )
 
 if(Qt6LinguistTools_FOUND)
-    # TODO: Update to new qt_add_translations form in Qt6.7
-    file(GLOB TS_SOURCES ${CMAKE_SOURCE_DIR}/translations/qgc_*.ts)
-    set_source_files_properties(${TS_SOURCES} PROPERTIES OUTPUT_LOCATION "${CMAKE_BINARY_DIR}/translations")
-    qt_add_translations(${PROJECT_NAME}
-        TS_FILES ${TS_SOURCES}
-        RESOURCE_PREFIX "/i18n"
-        LUPDATE_OPTIONS -no-obsolete
-    )
+    file(GLOB TS_SOURCES RELATIVE ${CMAKE_SOURCE_DIR} ${CMAKE_SOURCE_DIR}/translations/qgc_*.ts)
+    qt_add_translations(${PROJECT_NAME} TS_FILES ${TS_SOURCES}) # TODO: Update to new qt_add_translations form in Qt6.7
 endif()
 
 set_target_properties(${PROJECT_NAME}