Added opensuse/leap:15 to spack containerize (#27837)

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

lib/spack/docs/containers.rst

@@ -129,6 +129,9 @@ are currently supported are summarized in the table below:
    * - CentOS 7
      - ``centos:7``
      - ``spack/centos7``
+   * - openSUSE Leap
+     - ``opensuse/leap``
+     - ``spack/leap15``
 
 All the images are tagged with the corresponding release of Spack:
 

lib/spack/spack/container/images.json

@@ -28,6 +28,19 @@
         "develop": "latest"
       }
     },
+    "opensuse/leap:15": {
+      "bootstrap": {
+        "template": "container/leap-15.dockerfile"
+      },
+      "os_package_manager": "zypper",
+      "build": "spack/leap15",
+      "build_tags": {
+        "develop": "latest"
+      },
+      "final": {
+        "image": "opensuse/leap:latest"
+      }
+    },
     "nvidia/cuda:11.2.1": {
       "bootstrap": {
         "template": "container/cuda_11_2_1.dockerfile",
@@ -85,6 +98,11 @@
       "update": "yum update -y && amazon-linux-extras install epel -y",
       "install": "yum install -y",
       "clean": "rm -rf /var/cache/yum  && yum clean all"
+    },
+    "zypper": {
+      "update": "zypper update -y",
+      "install": "zypper install -y",
+      "clean": "rm -rf /var/cache/zypp  && zypper clean -a"
     }
   }
 }