OZG-5590 OZG-5594 Add required to inputs

alfa-client/apps/demo/src/app/app.component.html

...form/file-upload-editor/file-upload-editor.component.html

.../design-system/src/lib/attachment/attachment.component.ts

...esign-system/src/lib/button-card/button-card.component.ts

...ent/libs/design-system/src/lib/button/button.component.ts

...lib/form/radio-button-card/radio-button-card.component.ts

...design-system/src/lib/form/textarea/textarea.component.ts

...rgang-detail-bescheiden-dokument-hochladen.component.html