Add Kubernetes CTS

This adds patches and build specifications for the Kubernetes Conformance Test Suite. This involves
gating various cloud-specific tests behind the providerless flag (otherwise we'd gain a ton of additional dependencies)
and an additional 60MiB in test binary size.
Since the CTS for weird reasons requires kubectl to be available in the path we first build a kubectl go_image and then
stack the CTS on top of it. The output bundle is then preseeded for use.

Test Plan: `bazel run //core/tests/e2e/k8s_cts`

Bug: T836

X-Origin-Diff: phab/D615
GitOrigin-RevId: 7d2cd780a3ffb63b217591c5854b4aec4031d83d
diff --git a/core/cmd/launch/main.go b/core/cmd/launch/main.go
index 9bb4732..aba3dda 100644
--- a/core/cmd/launch/main.go
+++ b/core/cmd/launch/main.go
@@ -34,7 +34,7 @@
 		<-sigs
 		cancel()
 	}()
-	if err := launch.Launch(ctx, launch.Options{Ports: launch.IdentityPortMap(), SerialPort: os.Stdout}); err != nil {
+	if err := launch.Launch(ctx, launch.Options{Ports: launch.IdentityPortMap(launch.NodePorts), SerialPort: os.Stdout}); err != nil {
 		if err == ctx.Err() {
 			return
 		}