Adding Ectd integration tests

[codelipenghui]

Is your enhancement request related to a problem? Please describe.
Pulsar supports Ectd as metadata service backend in #13225
It's better to have an integration test to use ectd as the metadata service of bookkeeper and pulsar.

[gaozhangmin]

@codelipenghui Please assign to me.

[github-actions]

The issue had no activity for 30 days, mark with Stale label.

[github-actions]

The issue had no activity for 30 days, mark with Stale label.

[tisonkun]

Closing as stale and no one worked on it. Please open a new issue if you volunteer to do it.