fix(anta.cli): Use configured anta inventory as output by default in get from-ansible

[titom73]

Description

Use configured anta inventory by default in anta get from-ansible command. Also the knob -i for ansible-inventory has been renamed -ai to avoid confusion with anta inventory.

❯ anta get from-ansible --ansible-inventory .personal/ansible.yml -g ATD_LEAFS
[14:22:50] INFO     Building inventory from ansible file .personal/ansible.yml              
           INFO     output anta inventory is: .personal/inventory.yml                       
           INFO        * adding entry for s1-leaf1                                          
           INFO        * adding entry for s1-leaf2                                          
           INFO        * adding entry for s1-leaf3                                          
           INFO        * adding entry for s1-leaf4                                          
           INFO     ANTA device inventory file has been created in .personal/inventory.yml  

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have run pre-commit for code linting and typing (pre-commit run)
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (tox -e testenv)