Fix pydantic basemodel default input

[Future-Outlier]

Tracking issue

flyteorg/flyte#5318

Why are the changes needed?

We should make default input for pydantic basemodel works.

What changes were proposed in this pull request?

add default input logic handling for pydantic basemodel in to_click_option.

How was this patch tested?

local execution, remote execution, and integration test.

import os
from flytekit import map_task
from typing import  List
from flytekit import task, workflow, ImageSpec

from pydantic import BaseModel

flytekit_hash = "b3428e7d38cc1e834799bc8ea07f7dc7ebdab527"
flytekit = f"git+https://github.com/flyteorg/flytekit.git@{flytekit_hash}"
image = ImageSpec(
    packages=[flytekit, "pydantic>2"],
    apt_packages=["git"],
    registry="localhost:30000",
)

class MyBaseModel(BaseModel):
    my_floats: List[float] = [1.0, 2.0, 5.0, 10.0]

@task(container_image=image)
def print_float(my_float: float):
    print(f"my_float: {my_float}")


@workflow
def wf(bm: MyBaseModel = MyBaseModel()):
    map_task(print_float)(my_float=bm.my_floats)

if __name__ == "__main__":
    from flytekit.clis.sdk_in_container import pyflyte
    from click.testing import CliRunner

    # wf()

    runner = CliRunner()
    path = os.path.realpath(__file__)
    result = runner.invoke(pyflyte.main, ["run", path, "wf"])
    print("Local Execution: ", result.output)

    result = runner.invoke(pyflyte.main, ["run", "--remote", path, "wf"])
    print("Local Execution: ", result.output)

Setup process

Screenshots

local execution

remote execution

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

Docs link

[thomasjpfan]

Is it enough to duck type here?

if hasattr(default_val, "model_dump_json"):
    # pydantic v2
    default_val = default_val.model_dump_json()
elif hasattr(default_val, "json"):
    # pydantic v1
    default_val = default_val.json()
else:
    encoder = JSONEncoder(python_type)
    default_val = encoder.encode(default_val)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.54%. Comparing base (f99d50e) to head (d46d292).
Report is 9 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #3013       +/-   ##
===========================================
+ Coverage   51.08%   96.54%   +45.45%     
===========================================
  Files         201       11      -190     
  Lines       21231      723    -20508     
  Branches     2731        0     -2731     
===========================================
- Hits        10846      698    -10148     
+ Misses       9787       25     -9762     
+ Partials      598        0      -598     

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