make bucket prefix for logical backup configurable (#2609)

* make bucket prefix for logical backup configurable
* include container comparison in logical backup diff
* add unit test and update description for compareContainers
* don't rely on users putting / in the config - reflect other comments from review

logical-backup/Dockerfile

@@ -0,0 +1,40 @@
+ARG BASE_IMAGE=registry.opensource.zalan.do/library/ubuntu-22.04:latest
+FROM ${BASE_IMAGE}
+LABEL maintainer="Team ACID @ Zalando <team-acid@zalando.de>"
+
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+RUN apt-get update     \
+    && apt-get install --no-install-recommends -y \
+        apt-utils \
+        ca-certificates \
+        lsb-release \
+        pigz \
+        python3-pip \
+        python3-setuptools \
+        curl \
+        jq \
+        gnupg \
+        gcc \
+        libffi-dev \
+    && curl -sL https://aka.ms/InstallAzureCLIDeb | bash \
+    && pip3 install --upgrade pip \
+    && pip3 install --no-cache-dir awscli --upgrade \
+    && pip3 install --no-cache-dir gsutil --upgrade \
+    && echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list \
+    && cat /etc/apt/sources.list.d/pgdg.list \
+    && curl --silent https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
+    && apt-get update \
+    && apt-get install --no-install-recommends -y  \
+        postgresql-client-16  \
+        postgresql-client-15  \
+        postgresql-client-14  \
+        postgresql-client-13  \
+        postgresql-client-12  \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY dump.sh ./
+
+ENV PG_DIR=/usr/lib/postgresql
+
+ENTRYPOINT ["/dump.sh"]