Issue #3485677 by grimreaper, pdureau: [5.1.0] Convert ID string props to identifier props

components/accordion/accordion.component.yml

components/accordion_item/accordion_item.component.yml

components/carousel/carousel.component.yml

components/dropdown/dropdown.component.yml

components/modal/modal.component.yml

components/nav/nav.component.yml

components/navbar/navbar.component.yml

components/navbar_nav/navbar_nav.component.yml

components/offcanvas/offcanvas.component.yml