[artifacts/container] Re-add curl (#183626)

Partially reverts https://github.com/elastic/kibana/pull/183334. Some
services using kibana as a base expect it to exist for running health
checks.


cc @jsoriano

src/dev/build/tasks/os_packages/docker_generator/templates/base/Dockerfile

@@ -107,7 +107,7 @@ RUN for iter in {1..10}; do \
       apt-get update  && \
       apt-get upgrade -y  && \
       apt-get install -y --no-install-recommends \
-       fontconfig libnss3 ca-certificates && \
+       fontconfig libnss3 curl ca-certificates && \
       apt-get clean && \
       rm -rf /var/lib/apt/lists/* && exit_code=0 && break || exit_code=$? && echo "apt-get error: retry $iter in 10s" && \
       sleep 10; \