[ODSC-55947] Pretty print python fire output

[VipulMascarenhas]

Description

There's a bug in python fire that causes the __str__ implementation of the dataclass to be ignored in case the result is a list of dataclasses. If the result is just one instance of dataclass and not a list, then __str__ implementation works fine.

We can use a custom serializer to make sure that the output is correctly updated.

Tests

1. Output of ads aqua model list with indent=4 in __str__, but NOT using serialize parameter for fire.Fire(). There are spaces in the output, but fire prints it in one line.

{     "compartment_id": "ocid1.compartment.oc1..<ocid>",     "icon": "",     "id": "ocid1.datasciencemodel.oc1.iad.<ocid>",     "is_fine_tuned_model": false,     "license": "license name",     "name": "model name",     "organization": "organization",     "project_id": "",     "tags": {         "license": "license name",         "task": "task name",         "OCI_AQUA": "active",         "organization": "organization",         "ready_to_fine_tune": "false"     },     "task": "task name",     "time_created": "2024-03-25T06:40:22.719000+00:00",     "console_link": [         "https://cloud.oracle.com/data-science/models/ocid1.datasciencemodel.oc1.iad.<ocid>?region=<region-name>"     ],     "search_text": "some_search_text",     "ready_to_deploy": true,     "ready_to_finetune": false }
...
...

2. Output of ads aqua model list with indent=4 in __str__, with serialize parameter for fire.Fire(). This will be the new output after the code changes in this PR.

{
    "compartment_id": "ocid1.compartment.oc1..<ocid>",
    "icon": "",
    "id": "ocid1.datasciencemodel.oc1.iad.<ocid>",
    "is_fine_tuned_model": false,
    "license": "license name",
    "name": "model name",
    "organization": "organization",
    "project_id": "",
    "tags": {
        "license": "license name",
        "task": "task name",
        "OCI_AQUA": "active",
        "organization": "organization",
        "ready_to_fine_tune": "false"
    },
    "task": "task name",
    "time_created": "2024-03-25T06:40:22.719000+00:00",
    "console_link": [
        "https://cloud.oracle.com/data-science/models/ocid1.datasciencemodel.oc1.iad.<ocid>?region=<region-name>"
    ],
    "search_text": "some_search_text",
    "ready_to_deploy": true,
    "ready_to_finetune": false
}
...
...

3. Output of ads aqua model list without __str__ function (this was commented out in serializer.py ) but using serialize parameter for fire.Fire(). This will not be used, but added here to show the output of serialize function.

compartment_id: ocid1.compartment.oc1..<ocid>
console_link:
- https://cloud.oracle.com/data-science/models/ocid1.datasciencemodel.oc1.iad.<ocid>?region=<region-name>
icon: ''
id: ocid1.datasciencemodel.oc1.iad.<ocid>
is_fine_tuned_model: false
license: license name
name: model name
organization: organization
project_id: ''
ready_to_deploy: true
ready_to_finetune: false
search_text: some_search_text
tags:
  OCI_AQUA: active
  license: license name
  organization: organization
  ready_to_fine_tune: 'false'
  task: task name
task: task name
time_created: 2024-03-25 06:40:22.719000+00:00

[mingkang111]

Can you please rebase the feature/aquav1.0.1 ? The feature/aquav1.0.1 just rebase main.

[VipulMascarenhas]

@mayoor removed redundant __str__ check, just printing the object is enough.