chore(sdk): release KFP SDK 2.7.0

[connor-mccarthy]

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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

[google-oss-prow]

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[nithin8702]

Hi Team,
Is it possible to include this PR in this release?

#10471

[google-oss-prow]

@connor-mccarthy: 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
test-run-all-gcpc-modules	55e9ab5	link	true	/test test-run-all-gcpc-modules
kfp-kubernetes-execution-tests	55e9ab5	link	false	/test kfp-kubernetes-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.

[connor-mccarthy]

@nithin8702, the changes in #10471 are released in kfp-kubernetes, so it is unrelated to the current release PR.

[chensun]

/lgtm