fix(sdk): add registry json to package data

[connor-mccarthy]

Description of your changes:
Fixes a bug where json files are not distributed with the KFP package.

Checklist:

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[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

[connor-mccarthy]

/test all

[hilcj]

/approve
/lgtm

[google-oss-prow]

@connor-mccarthy: 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-samples-v2	4bc70af	link	true	/test kubeflow-pipelines-samples-v2

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[chongyouquan]

/lgtm
/approve

[chensun]

/lgtm
/approve

Thanks!

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chensun, chongyouquan, hilcj

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• sdk/OWNERS [chensun]

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[connor-mccarthy]

Sample tests are unaffected by this change. Failures are due to other known issues. Manually merging.