[robustness] kubernetes traffic is unable to send List request

[fuweid]

Bug report criteria

• This bug report is not security related, security issues should be disclosed privately via etcd maintainers.
• This is not a support request or question, support requests or questions should be raised in the etcd discussion forums.
• You have read the etcd bug reporting guidelines.
• Existing open issues along with etcd frequently asked questions have been checked and this is not a duplicate.

What happened?

Since #19137, the kubernetes traffic is unable to send list request because end field is reset.

etcd/tests/robustness/client/client.go

Lines 90 to 92 in 2895b19

	func (c *RecordingClient) Get(ctx context.Context, key string, opts ...clientv3.OpOption) (*clientv3.GetResponse, error) {
	revision := clientv3.OpGet(key, opts...).Rev()
	return c.Range(ctx, key, "", revision, 0)

What did you expect to happen?

kubernetes traffic api should send list request during robustness test

How can we reproduce it (as minimally and precisely as possible)?

Run any robustness tests with kubernetes traffic

Anything else we need to know?

client/v3 package doesn't export limit so it's hard to get all the information from Op provided by kubernetes.List.

Etcd version (please run commands below)

$ etcd --version
# paste output here

$ etcdctl version
# paste output here

Etcd configuration (command line flags or environment variables)

paste your configuration here

Etcd debug information (please run commands below, feel free to obfuscate the IP address or FQDN in the output)

$ etcdctl member list -w table
# paste output here

$ etcdctl --endpoints=<member list> endpoint status -w table
# paste output here

Relevant log output

[serathius]

cc @AwesomePatrol

[serathius]

@AwesomePatrol Can you take a look and confirm if this is an issue?