fix: migrate deprecated Pydantic v1 class Config with ConfigDict for pydantic v2 compatabilty

[haroon0x]

fix: replace deprecated Pydantic v1 class Config with ConfigDict

Description

Replaces all instances of the deprecated Pydantic v1 class Config pattern with the Pydantic v2 equivalent model_config = ConfigDict(...).

This resolves the PydanticDeprecatedSince20 warnings that appear when using these models with Pydantic v2.

Changes

File	Class	Change
kubeflow/common/types.py	KubernetesBackendConfig	class Config → model_config = ConfigDict(arbitrary_types_allowed=True)
kubeflow/trainer/backends/localprocess/types.py	LocalBackendStep	Same
kubeflow/trainer/backends/localprocess/types.py	LocalBackendJobs	Same

Verification

• Ruff linting passes on all edited files
• Python syntax verified via py_compile
• Project requires pydantic >= 2.10.0 so ConfigDict is available

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[Copilot]

Pull request overview

Replaces deprecated Pydantic v1 class Config pattern with v2 model_config = ConfigDict(...) to eliminate PydanticDeprecatedSince20 warnings.

Changes:

• Updated LocalBackendStep and LocalBackendJobs to use ConfigDict.
• Updated KubernetesBackendConfig to use ConfigDict.
• Added ConfigDict imports.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
kubeflow/trainer/backends/localprocess/types.py	Migrates two model configs to ConfigDict.
kubeflow/common/types.py	Migrates one model config to ConfigDict.