refactor(relint-base): Reformat bash runs

Seems nice to use `set` to get error checking and push up failures,
which then also allows us to use semicolons instead of double ampersands
to break lines.

dockerfiles/relint-base/Dockerfile

@@ -1,14 +1,15 @@
 FROM golang:1.20.7-bullseye
 
-RUN \
-  apt-get update && \
-  apt-get -y install \
-    ack \
-    jq
+RUN set -eux; \
+      apt-get update; \
+      apt-get -y install \
+        ack \
+        jq
 
 # Add trusted relint ca certificate
 ARG RELINT_CA_CERTIFICATE
 ARG PREVIOUS_RELINT_CA_CERTIFICATE
-RUN echo -n "$RELINT_CA_CERTIFICATE" > /usr/local/share/ca-certificates/relint.crt && \
-    echo -n "$PREVIOUS_RELINT_CA_CERTIFICATE" > /usr/local/share/ca-certificates/previous_relint.crt && \
-  /usr/sbin/update-ca-certificates -f
+RUN set -e; \
+      echo -n "${RELINT_CA_CERTIFICATE}" > /usr/local/share/ca-certificates/relint.crt; \
+      echo -n "${PREVIOUS_RELINT_CA_CERTIFICATE}" > /usr/local/share/ca-certificates/previous_relint.crt; \
+      /usr/sbin/update-ca-certificates -f