Make debian-i18n-testing capable of testing various shells

dockerfiles/debian-i18n-testing

@@ -1,6 +1,7 @@
 FROM debian:12-slim
 ENV DEBIAN_FRONTEND=noninteractive DEBCONF_NOWARNINGS=yes
-RUN apt-get update && apt-get install -y locales-all
+RUN apt-get update && apt-get install -y locales-all ksh mksh posh yash zsh
 RUN useradd -m user
+RUN rm -f /usr/bin/time /bin/time
 ENV LC_ALL=de_DE.utf8
 ENV SH=/bin/bash