fix angular material imports due to deprecation

goofy-client/apps/goofy/src/app/app.module.ts

...-file-container/binary-file/binary-file.component.spec.ts

...rgang-forward-form/vorgang-forward-form.component.spec.ts

...container/kommentar-form/kommentar-form.component.spec.ts

...ent/libs/postfach-shared/src/lib/postfach.service.spec.ts

...y-client/libs/postfach-shared/src/lib/postfach.service.ts

...ton-container/postfach-mail-button-container.component.ts

...b/postfach-mail-form/postfach-mail-form.component.spec.ts

...rc/lib/postfach-mail-form/postfach-mail-form.component.ts

...ibs/ui/src/lib/interceptor/http-error.interceptor.spec.ts

.../snackbar/snackbar-error/snackbar-error.component.spec.ts

...c/lib/snackbar/snackbar-error/snackbar-error.component.ts

...ib/snackbar/snackbar-info/snackbar-info.component.spec.ts

...src/lib/snackbar/snackbar-info/snackbar-info.component.ts

...-client/libs/ui/src/lib/snackbar/snackbar.service.spec.ts

goofy-client/libs/ui/src/lib/snackbar/snackbar.service.ts

...button-with-spinner/button-with-spinner.component.spec.ts

...y-client/libs/ui/src/lib/ui/dialog/dialog.service.spec.ts

goofy-client/libs/ui/src/lib/ui/dialog/dialog.service.ts

...autocomplete-editor/autocomplete-editor.component.spec.ts