Automatic merge from submit-queue (batch tested with PRs 39648, 38167, 39591, 39415, 39612)

Add verbs to thirdparty resources in discovery

The namespace controller ignores thirdparty resources right now because verbs are not set. This PR sets a static list of verbs.

Moreover, integration tests are added for the discovery info of thirdparty resources.

/cc @zhouhaibing089