Add E2E tests for basic functionality and port launching to Go

This adds a new E2E test suite replacing the old log-parsing
based one. It also moves launching and controlling Smalltown VMs into
a Go package and command and exposes the '//:launch' alias.
The new E2E test suite covers basic conditions (IP assigned, Data
available) and Kubernetes Node, Deployment and StatefulSet tests.

Test Plan: This consists of E2E tests

X-Origin-Diff: phab/D544
GitOrigin-RevId: 7c624c667c849068bafa544a3a6c635d6d406e1c
diff --git a/core/cmd/launch/main.go b/core/cmd/launch/main.go
new file mode 100644
index 0000000..100d350
--- /dev/null
+++ b/core/cmd/launch/main.go
@@ -0,0 +1,43 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"git.monogon.dev/source/nexantic.git/core/internal/launch"
+)
+
+func main() {
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+	ctx, cancel := context.WithCancel(context.Background())
+	go func() {
+		<-sigs
+		cancel()
+	}()
+	if err := launch.Launch(ctx, launch.Options{Ports: launch.IdentityPortMap()}); err != nil {
+		if err == ctx.Err() {
+			return
+		}
+		fmt.Printf("Failed to execute: %v\n", err)
+	}
+}