[3.5] Add approvals gh workflows.

[liangyuanpeng]

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

Releated: #17616 (review)

Actually, this config is not work for release3.5 and release3.4, we need let this workflow file exist at release-3.5.

etcd/.github/workflows/gh-workflow-approve.yaml

Lines 9 to 12 in 6f55dfa

	branches:
	- main
	- release-3.5
	- release-3.4

Once this PR is merged, we can verify on #17616

[k8s-ci-robot]

Hi @liangyuanpeng. Thanks for your PR.

I'm waiting for a etcd-io 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.

I understand the commands that are listed here.

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.

[liangyuanpeng]

/cc @jmhbnz

[liangyuanpeng]

/retest

[k8s-ci-robot]

@liangyuanpeng: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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.

[jmhbnz]

/ok-to-test

[jmhbnz]

LGTM - Thanks @liangyuanpeng