Add --container-enabled option to ansible-galaxy init command. (#18157)

lib/ansible/galaxy/data/default/meta/main.yml.j2

@@ -0,0 +1,60 @@
+galaxy_info:
+  author: {{ author }}
+  description: {{ description }}
+  company: {{ company }}
+
+  # If the issue tracker for your role is not on github, uncomment the
+  # next line and provide a value
+  # issue_tracker_url: {{ issue_tracker_url }}
+
+  # Some suggested licenses:
+  # - BSD (default)
+  # - MIT
+  # - GPLv2
+  # - GPLv3
+  # - Apache
+  # - CC-BY
+  license: {{ license }}
+
+  min_ansible_version: {{ min_ansible_version }}
+
+  # If this a Container Enabled role, provide the minimum Ansible Container version.
+  # min_ansible_container_version:
+
+  # Optionally specify the branch Galaxy will use when accessing the GitHub
+  # repo for this role. During role install, if no tags are available,
+  # Galaxy will use this branch. During import Galaxy will access files on
+  # this branch. If Travis integration is configured, only notifications for this
+  # branch will be accepted. Otherwise, in all cases, the repo's default branch
+  # (usually master) will be used.
+  #github_branch:
+
+  #
+  # Below are all platforms currently available. Just uncomment the ones that apply
+  # to your role. If you don't see your platform on this list, let us know,
+  # and we'll get it added!
+  #
+  #platforms:
+  {%- for platform,versions in platforms.items() %}
+  #- name: {{ platform }}
+  #  versions:
+  #  - all
+    {%- for version in versions %}
+  #  - {{ version }}
+    {%- endfor -%}
+  {%- endfor %}
+
+  galaxy_tags: []
+    # List tags for your role here, one per line. A tag is a keyword that describes
+    # and categorizes the role. Users find roles by searching for tags. Be sure to
+    # remove the '[]' above, if you add tags to this list.
+    #
+    # NOTE: A tag is limited to a single word comprised of alphanumeric characters.
+    #       Maximum 20 tags per role.
+
+dependencies: []
+  # List your role dependencies here, one per line. Be sure to remove the '[]' above,
+  # if you add dependencies to this list.
+  {%- for dependency in dependencies %}
+  #- {{ dependency }}
+  {%- endfor %}