fix(sdk): allow user to choose platform for component container build. Fixes #8883

[browningjp]

Description of your changes:

Add the --platform option to kfp component build to choose container build architecture. Fixes #8883

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]

Hi @browningjp. Thanks for your PR.

I'm waiting for a kubeflow member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[browningjp]

Couple of things for discussion/consideration:

• Technically this is altering the current behaviour by setting the default platform to linux/amd64. Is this an issue?
• Unsure about how to approach the unit tests - at the moment I have just tweaked an existing test, but this could be split into additional test(s)

[chensun]

/ok-to-test

[chensun]

/lgtm
/approve

Thanks!

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chensun

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• sdk/OWNERS [chensun]

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[google-oss-prow]

@browningjp: The following test 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-pipelines-sdk-execution-tests	91d18ce	link	false	/test kubeflow-pipelines-sdk-execution-tests

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.