chore(agent/agentcontainers): skip TestDockerCLIContainerLister by default (#16502)

Addresses a test flake seen here:
https://github.com/coder/coder/actions/runs/13239819615/job/36952521742

Also addresses the case where we would try to run `docker inspect` with
no container IDs, which is a silly thing to do.

agent/agentcontainers/containers_dockercli.go

@@ -59,6 +59,11 @@ func (dcl *DockerCLILister) List(ctx context.Context) (codersdk.WorkspaceAgentLi
 	}
 
 	dockerPsStderr := strings.TrimSpace(stderrBuf.String())
+	if len(ids) == 0 {
+		return codersdk.WorkspaceAgentListContainersResponse{
+			Warnings: []string{dockerPsStderr},
+		}, nil
+	}
 
 	// now we can get the detailed information for each container
 	// Run `docker inspect` on each container ID