build multi-arch pooler image (#3077)

* build multi-arch pooler image
* add pooler build step in delivery.yaml and bump pooler version
* pull from docker hub not zalando registry
* add pooler step to ghcr workflow
* pass infra roles to auth file via pooler entrypoint
* introduce extra pooler secret for mounting auth_file
* use pbgouncer as image name and push to ghcr on next merge
* build with latest pgbouncer
* integrate new image in e2e process and update pooler image default
* update pooler build dependencies
* build pooler image for e2e test
* more Makefile and e2e run script tweaking

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Co-authored-by: Ida Novindasari <idanovinda@gmail.com>

e2e/exec_into_env.sh

@@ -3,6 +3,7 @@
 export cluster_name="postgres-operator-e2e-tests"
 export kubeconfig_path="/tmp/kind-config-${cluster_name}"
 export operator_image="ghcr.io/zalando/postgres-operator:latest"
+export pooler_image="ghcr.io/zalando/postgres-operator/pgbouncer:latest"
 export e2e_test_runner_image="ghcr.io/zalando/postgres-operator-e2e-tests-runner:latest"
 
 docker run -it --entrypoint /bin/bash --network=host -e "TERM=xterm-256color" \
@@ -11,4 +12,5 @@ docker run -it --entrypoint /bin/bash --network=host -e "TERM=xterm-256color" \
     --mount type=bind,source="$(readlink -f tests)",target=/tests \
     --mount type=bind,source="$(readlink -f exec.sh)",target=/exec.sh \
     --mount type=bind,source="$(readlink -f scripts)",target=/scripts \
-    -e OPERATOR_IMAGE="${operator_image}" "${e2e_test_runner_image}"
+    -e OPERATOR_IMAGE="${operator_image}" -e POOLER_IMAGE="${pooler_image}" \
+    "${e2e_test_runner_image}"