[chore] Upgrade docker/metadata-action, actions/checkout, and actions/setup-python version

[tenzen-y]

Signed-off-by: tenzen-y yuki.iwai.tz@gmail.com

What this PR does / why we need it:
To resolve the following warning, I upgraded docker/metadata-action to v4, actions/checkout to v3, and actions/setup-python to v4.

Node.js 12 actions are deprecated. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/. Please update the following actions to use Node.js 16: actions/checkout, docker/metadata-action, actions/checkout

Node.js 12 actions are deprecated. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/. Please update the following actions to use Node.js 16: actions/checkout, actions/setup-python, actions/setup-python, actions/checkout

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Checklist:

• Docs included if any changes are user facing

[tenzen-y]

/assign @johnugeorge

[coveralls]

Coverage increased (+0.1%) to 73.545% when pulling 4d60191 on tenzen-y:upgrade-metadata-action-version into 570a3e6 on kubeflow:master.

[johnugeorge]

/lgtm
/approve

[google-oss-prow]

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