Deprecate Parser filter plugins

[rohitthakur2590]

Summary

This PR deprecates the following filter plugins in the ansible.netcommon collection:

• parse_cli
• parse_cli_textfsm
• parse_xml

These plugins are replaced by their respective counterparts in the ansible.utils collection:

• parse_cli → cli_parse
• parse_cli_textfsm → textfsm_parser
• parse_xml → xml_parser

Changes

• Updated documentation with deprecation notices.
• Updated plugin code to display deprecation warnings.

Impact

• These plugins will remain functional .
• They will be removed in a future release after 2027-02-01.

Migration

Users are encouraged to switch to the ansible.utils plugins:

• Example for parse_cli:

Old usage:
 - name: Parse CLI output with TextFSM
      ansible.builtin.set_fact:
        parsed_output: "{{ cli_output | parse_cli_textfsm('templates/show_ip_interface_brief.textfsm') }}""

  New usage:
    - name: "Pass text and command"
      ansible.utils.cli_parse:
        text: "{{ lookup('ansible.builtin.file', 'show_ip_interface_brief.txt') }}"
        parser:
          name: ansible.utils.textfsm
          template_path: "templates/show_ip_interface_brief.textfsm"
      register: nxos_textfsm_text