Fix get_pipeline_id: Accept Namespace Parameter in Kubeflow Pipelines

[afrozsh19]

Summary

This pull request fixes the issue where the get_pipeline_id function returns None when called for a pipelines created as private. The function now accepts a namespace parameter and passes it to the list_pipelines function, ensuring the correct pipeline ID is returned.

Changes

• Modified get_pipeline_id function to accept a namespace parameter.

Issue Reference

Fixes #10909

Additional Context

This change ensures that the get_pipeline_id function works as expected in environments where namespaces are used.