Disable protected namespace warning

[VipulMascarenhas]

Description

• Disable protected_namespaces in Config to avoid printing a warning message for parameter starting with model_.

Before the fix:

> ads aqua model list
INFO:ads.common:Using 'api_key' authentication.
WARNING:py.warnings:/Users/user/miniconda3/envs/ads-aqua-v38/lib/python3.8/site-packages/pydantic/_internal/_fields.py:160: UserWarning: Field "model_parameters" has conflict with protected namespace "model_".

You may be able to resolve this warning by setting `model_config['protected_namespaces'] = ()`.
  warnings.warn(

{
    "compartment_id": "ocid1.compartment.oc1..<ocid>",
    "icon": "",
    ...

After the fix:

> ads aqua model list
INFO:ads.common:Using 'api_key' authentication.
{
    "compartment_id": "ocid1.compartment.oc1..<ocid>",
    "icon": "",
    ...

[github-actions]

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