OZG-8129 replace incoming icon

alfa-client/libs/design-system/src/assets/incoming.svg

alfa-client/libs/ui/src/lib/assets/incoming.svg

alfa-client/libs/ui/src/lib/icon/icon.model.ts

alfa-client/libs/ui/src/lib/icon/icon.service.spec.ts

...organg-search-autocomplete-options-content.component.html

...ang-search-autocomplete-options-content.component.spec.ts

...item/vorgang-created-at/vorgang-created-at.component.html

...item/vorgang-created-at/vorgang-created-at.component.scss

...m/vorgang-created-at/vorgang-created-at.component.spec.ts