Enable epel repository for more than CentOS

The epel repository contains among other things 'debootstrap',
which is needed by dib_host_required_packages, whenever
dib_os_element contains the word 'debian' (or 'ubuntu'), which
is the default[1] and install_dib is true which it also is by
default[2]

This improves upon I57513883c0fa8d6ffb2c70debb81d5e7e6d8b221
where the documentation[3] and procedure has probably been updated
since it was last followed. We can also remove the conditional
installation of dib_host_required_packages with enablerepo: epel
for centos

[1] bifrost-ironic-install/defaults/main.yml:dib_os_element: "debian"
[2] bifrost-ironic-install/defaults/main.yml:install_dib: "{{ create_image_via_dib | bool or create_ipa_image | bool }}"
    bifrost-ironic-install/defaults/main.yml:create_image_via_dib: "{{ not use_cirros | default(false) | bool }}"
    bifrost-ironic-install/defaults/main.yml:use_cirros: false
[3] https://docs.fedoraproject.org/en-US/epel/#_el9

Change-Id: Ia16b544df261b999b1503ee110ec88f39becd7dd

playbooks/roles/bifrost-ironic-install/tasks/install.yml

@@ -18,25 +18,28 @@
   when: ansible_os_family == 'Debian'
 
 - block:
-  - name: "Enable powertools repository for CentOS Stream 8"
+  - name: "Enable powertools repository for EL8"
     command: dnf config-manager --set-enabled powertools
-  - name: "Enable EPEL repository for CentOS Stream 8"
-    command: dnf install -y epel-release
-    when:
-    - enable_epel | bool
-    - dib_os_element == "debian"
-  when:
-  - ansible_distribution == "CentOS"
-  - ansible_distribution_version|int == 8
+    when: ansible_distribution_version|int == 8
 
-- name: "Enable EPEL repository for CentOS Stream 9"
+  - name: "Enable crb repository for EL9"
+    command: dnf config-manager --set-enabled crb
+    when: ansible_distribution_version|int == 9
+
+  - name: "Enable EPEL repository for EL7/8/9"
+    ansible.builtin.dnf:
+      name: epel-release
+  when:
+  - enable_epel | bool
+  - ansible_distribution in ["AlmaLinux", "CentOS", "Rocky"]
+
+- name: "Enable EPEL repository for RedHat 9"
   command: dnf install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm
   args:
     creates: /etc/yum.repos.d/epel.repo
   when:
   - enable_epel | bool
-  - dib_os_element == "debian"
-  - ansible_distribution == "CentOS"
+  - ansible_distribution == "RedHat"
   - ansible_distribution_version|int >= 9
 
 - name: "Install packages"
@@ -81,16 +84,6 @@
     state: present
   when:
    - install_dib | bool
-   - ansible_distribution != "CentOS"
-
-- name: Ensure required packages are installed
-  dnf:
-    name: "{{ dib_host_required_packages | select | list }}"
-    enablerepo: epel
-    state: present
-  when:
-   - install_dib | bool
-   - ansible_distribution == "CentOS"
 
 - name: "sushy - Install"
   include_role: