### Summary

lookup function fails - lookup('ansible.builtin.ini', ...)

Ansible ini is using the function 'readfp'  on Configmap this function was [removed ](https://issues.apache.org/jira/browse/SVN-4899#:~:text=Description,3.12%20(due%20October%202023).) on python 3.12


### Issue Type

Bug Report

### Component Name

ansible.builtin.ini

### Ansible Version

```console
$ ansible --version
ansible [core 2.15.3]
  config file = /home/liss/webnews/pyramid-rt4/ansible/ansible.cfg
  configured module search path = ['/home/liss/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/liss/.local/lib/python3.12/site-packages/ansible
  ansible collection location = /home/liss/webnews/pyramid-rt4/ansible/collections
  executable location = /home/liss/.local/bin/ansible
  python version = 3.12.0rc1 (main, Aug  6 2023, 17:56:34) [GCC 9.4.0] (/usr/bin/python3)
  jinja version = 3.1.2
  libyaml = True
```


### Configuration

```console
# if using a version older than ansible-core 2.12 you should omit the '-t all'
$ ansible-config dump --only-changed -t all
```


### OS / Environment

"Ubuntu 20.04.6 LTS" on WSL

### Steps to Reproduce

- name:
  set_fact:
    planning_service_monitor_consul_token: "{{ lookup('ansible.builtin.ini', 'consul_token', file='/tmp/pyr_tmp', section='Consul', allow_no_value=True) }}"


### Expected Results

Success

### Actual Results

```console
fatal: [localhost]: FAILED! =>
  msg: 'An unhandled exception occurred while running the lookup plugin ''ansible.builtin.ini''. Error was a <class ''AttributeError''>, original message: ''ConfigParser'' object has no attribute ''readfp''. ''ConfigParser'' object has no attribute ''readfp'''
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
- ansible.builtin.debug: msg="user.name is {{ lookup('ansible.builtin.ini', 'user.name', type='properties', file='user.properties') }}"
- ansible.builtin.debug:
    msg: "{{ item }}"
  loop: "{{ q('ansible.builtin.ini', '.*', section='section1', file='test.ini', re=True) }}"
- name: Read an ini file with allow_no_value
  ansible.builtin.debug:
    msg: "{{ lookup('ansible.builtin.ini', 'user', file='mysql.ini', section='mysqld', allow_no_value=True) }}"
"""
RETURN = """
_raw:
  description:
    - value(s) of the key(s) in the ini file
  type: list
  elements: str
"""
import configparser
import os
import re
from io import StringIO
from collections import defaultdict
from collections.abc import MutableSequence
from ansible.errors import AnsibleLookupError, AnsibleOptionsError
from ansible.module_utils.common.text.converters import to_text, to_native
from ansible.plugins.lookup import LookupBase
def _parse_params(term, paramvals):
    '''Safely split parameter term to preserve spaces'''
    
    valid_keys = paramvals.keys()
    params = defaultdict(lambda: '')