Ozg-7707 replace more icons

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

...stellen-button/anfrage-erstellen-button.component.spec.ts

...client/libs/collaboration/src/lib/collaboration.module.ts

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

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

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

...ystem/src/lib/icons/user-icon/user-icon.component.spec.ts

...ign-system/src/lib/icons/user-icon/user-icon.component.ts

...esign-system/src/lib/icons/user-icon/user-icon.stories.ts

...tem/src/lib/icons/users-icon/users-icon.component.spec.ts

...n-system/src/lib/icons/users-icon/users-icon.component.ts

...ign-system/src/lib/icons/users-icon/users-icon.stories.ts

...s/user-profile/src/lib/user-icon/user-icon.component.html

...ser-profile/src/lib/user-icon/user-icon.component.spec.ts

alfa-client/libs/user-profile/src/lib/user-profile.module.ts