Add python install DIB element

Author: seunghun1ee

etc/kayobe/overcloud-dib.yml

@@ -67,7 +67,7 @@ overcloud_dib_host_packages_extra:
 overcloud_dib_git_elements_extra:
   - repo: "https://github.com/stackhpc/stackhpc-image-elements"
     local: "{{ source_checkout_path }}/stackhpc-image-elements"
-    version: "v1.6.3"
+    version: "python-version"
     elements_path: "elements"
 
 # List of git repositories containing Diskimage Builder (DIB) elements. See

etc/kayobe/stackhpc-overcloud-dib.yml

@@ -32,6 +32,7 @@ stackhpc_overcloud_dib_elements:
   - "{% if os_distribution == 'ubuntu' %}lvm{% endif %}"
   - "openssh-server"
   - "{% if os_distribution == 'ubuntu' %}sudoers{% endif %}"
+  - "{% if os_distribution == 'rocky' %}python-version-rpm{% endif %}"
 
 # StackHPC overcloud DIB image environment variables.
 stackhpc_overcloud_dib_env_vars:
@@ -58,6 +59,7 @@ stackhpc_overcloud_dib_env_vars:
   YUM: dnf
   # Workaround for stack user home ownership bug
   DIB_IMAGE_CACHE: "/tmp/yum"
+  DIB_PYTHON_VERSION: "python3.12"
 
 # StackHPC overcloud DIB image packages.
 stackhpc_overcloud_dib_packages: