zypper_repository: fix usage of removed method ConfigParser.readfp() (#10223)

* zypper_repository: fix usage of removed method ConfigParser.readfp()

ConfigParser.readfp() has been removed in python 3.12.
See similar fix e.g. in https://github.com/ansible/ansible/pull/81657

This fixes the error message:
AttributeError: 'ConfigParser' object has no attribute 'readfp'. Did you mean: 'read'?

* Update changelogs/fragments/10222-zypper_repository-readfp.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

---------

Co-authored-by: Felix Fontein <felix@fontein.de>

changelogs/fragments/10222-zypper_repository-readfp.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - zypper_repository - make compatible with Python 3.12+ (https://github.com/ansible-collections/community.general/issues/10222, https://github.com/ansible-collections/community.general/pull/10223).

plugins/modules/zypper_repository.py

@@ -142,6 +142,7 @@ from ansible.module_utils.basic import AnsibleModule, missing_required_lib
 
 from ansible.module_utils.urls import fetch_url
 from ansible.module_utils.common.text.converters import to_text
+from ansible.module_utils.six import PY3
 from ansible.module_utils.six.moves import configparser, StringIO
 from io import open
 
@@ -407,6 +408,9 @@ def main():
 
         repofile = configparser.ConfigParser()
         try:
+            if PY3:
+                repofile.read_file(StringIO(repofile_text))
+            else:
                 repofile.readfp(StringIO(repofile_text))
         except configparser.Error:
             module.fail_json(msg='Invalid format, .repo file could not be parsed')