Implement filtering in ListPipelines

[jiezhang]

This PR fixes issue #2945 by adding filter to the ListPipelines API.

Because ListPipelines joins table pipelines and pipeline_versions, and they both have a column name, we need to fully qualify the column in NewWithKeyMap to avoid "ambiguous column name" error.

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This change is 

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[jiezhang]

/retest

[jiezhang]

/test kubeflow-pipeline-sample-test

[jiezhang]

/test kubeflow-pipeline-sample-test

[jiezhang]

/assign @jingzhang36
/assign @IronPan

[IronPan]

/lgtm
/approve

[IronPan]

/lgtm
/approve

[IronPan]

/test kubeflow-pipeline-sample-test

[k8s-ci-robot]

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[Bobgy]

Fixes #2945