[WIP] Frontend - Metadata - Switching to contexts

[Ark-kun]

Fixes #2562

---

This change is 

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
To complete the pull request process, please assign bobgy
You can assign the PR to them by writing /assign @bobgy in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• frontend/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[Ark-kun]

@Bobgy Do you know the best way to update the metadata protobuf generated files?

[Bobgy]

@Ark-kun Sorry I didn't get enough time to pick up this. Thanks for jumping in by yourself.

I only knew the proto lives https://github.com/google/ml-metadata/tree/master/ml_metadata/proto.
I think @neuromage should know more about how it was used to generate the apis.

[k8s-ci-robot]

@Ark-kun: The following tests failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
kubeflow-pipeline-frontend-test	5120883	link	/test kubeflow-pipeline-frontend-test
kubeflow-pipeline-sample-test	5120883	link	/test kubeflow-pipeline-sample-test
kubeflow-pipeline-e2e-test	5120883	link	/test kubeflow-pipeline-e2e-test
kubeflow-pipeline-upgrade-test	5120883	link	/test kubeflow-pipeline-upgrade-test

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because it has not had recent activity. Please comment "/reopen" to reopen it.