chore: build from rhel repo on registered rhel system

konflux hermetic build does not allow installation of packages from copr

postgresql 16 module may contain incompatible pg_repack version, it must be tested in stage

Author: psegedy

Dockerfile

@@ -5,10 +5,9 @@ FROM ${BUILDIMG} as buildimg
 ARG INSTALL_TOOLS=no
 
 # install build, development and test environment
-RUN curl -o /etc/yum.repos.d/postgresql.repo \
-        https://copr.fedorainfracloud.org/coprs/g/insights/postgresql-16/repo/epel-9/group_insights-postgresql-16-epel-9.repo
-
-RUN dnf install -y go-toolset postgresql diffutils rpm-devel pg_repack
+RUN (dnf module enable -y postgresql:16 || curl -o /etc/yum.repos.d/postgresql.repo \
+        https://copr.fedorainfracloud.org/coprs/g/insights/postgresql-16/repo/epel-9/group_insights-postgresql-16-epel-9.repo) && \
+     dnf install -y go-toolset postgresql diffutils rpm-devel pg_repack
 
 ENV GOPATH=/go \
     GO111MODULE=on \