test: Moved kubeflow-pipelines-samples-v2 to GitHub Actions

[hbelmiro]

Description of your changes:
Moved kubeflow-pipelines-samples-v2 to GitHub Actions.

Resolves: #11054

PR to update GoogleCloudPlatform/oss-test-infra

• chore: Remove KFP presubmit kubeflow-pipelines-samples-v2 test prow config GoogleCloudPlatform/oss-test-infra#2335

Checklist:

• The title for your pull request (PR) should follow our title convention. Learn more about the pull request title convention used in this repository.

[google-oss-prow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[google-oss-prow]

@hbelmiro: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
kubeflow-pipeline-upgrade-test	181fa00	link	false	/test kubeflow-pipeline-upgrade-test
kubeflow-pipelines-samples-v2	181fa00	link	false	/test kubeflow-pipelines-samples-v2

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[hbelmiro]

@chensun @DharmitD can you guys PTAL?

[chensun]

/lgtm

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chensun

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• .github/OWNERS [chensun]
• backend/OWNERS [chensun]
• samples/OWNERS [chensun]

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