Jenkinsfile: add Rocky Linux and AlmaLinux

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

Jenkinsfile

@@ -10,6 +10,10 @@ def images = [
     [image: "docker.io/library/centos:7",               arches: ["amd64", "aarch64"]],
     [image: "quay.io/centos/centos:stream8",            arches: ["amd64", "aarch64"]],          // CentOS Stream 8 (EOL: 2024-05-31)
     [image: "quay.io/centos/centos:stream9",            arches: ["amd64", "aarch64"]],          // CentOS Stream 9 (EOL: 2027)
+    [image: "docker.io/library/rockylinux:8",           arches: ["amd64", "aarch64"]],          // Rocky Linux 8 (EOL: 2029-05-31)
+    [image: "docker.io/library/rockylinux:9",           arches: ["amd64", "aarch64"]],          // Rocky Linux 9 (EOL: 2032-05-31)
+    [image: "docker.io/library/almalinux:8",            arches: ["amd64", "aarch64"]],          // AlmaLinux 8 (EOL: 2029)
+    [image: "docker.io/library/almalinux:9",            arches: ["amd64", "aarch64"]],          // AlmaLinux 9 (EOL: 2032)
     [image: "docker.io/library/debian:buster",          arches: ["amd64", "aarch64", "armhf"]], // Debian 10 (EOL: 2022-09-10, EOL LTS: 2024-06-30)
     [image: "docker.io/library/debian:bullseye",        arches: ["amd64", "aarch64", "armhf"]], // Debian 11 (EOL: 2024)
     [image: "docker.io/library/debian:bookworm",        arches: ["amd64", "aarch64", "armhf"]], // Debian 12 (stable)

dockerfiles/rpm.dockerfile

@@ -47,6 +47,10 @@ FROM redhat-base AS ol-base
 RUN . "/etc/os-release"; if [ "${VERSION_ID%.*}" -eq 7 ]; then yum-config-manager --enable ol7_addons --enable ol7_optional_latest; fi
 RUN . "/etc/os-release"; if [ "${VERSION_ID%.*}" -eq 8 ]; then yum-config-manager --enable ol8_addons; fi
 
+FROM redhat-base AS rocky-base
+
+FROM redhat-base AS almalinux-base
+
 FROM ${BUILD_IMAGE} AS fedora-base
 RUN dnf install -y rpm-build git dnf-plugins-core