OZG-3539 OZG-6755 rename popup to dropdown menu

alfa-client/apps/admin/src/app/app.module.ts

...on-container/user-profile-button-container.component.html

...container/user-profile-button-container.component.spec.ts

alfa-client/libs/design-system/src/index.ts

...u/dropdown-menu-item/dropdown-menu-item.component.spec.ts

...n-menu/dropdown-menu-item/dropdown-menu-item.component.ts

...opdown-menu/dropdown-menu/dropdown-menu.component.spec.ts

...ib/dropdown-menu/dropdown-menu/dropdown-menu.component.ts

.../lib/dropdown-menu/dropdown-menu/dropdown-menu.stories.ts

.../src/lib/popup/popup-list-item/popup-list-item.stories.ts