Here's a hacky tool to migrate our ongoing v0.0.1 measurement once it's
done.  I.e., just split-up the NOTICE prints we have in collect.stdout,
putting them in per-log notice files that happens automatically now.

```
// Package main provides a hacky tool that extracts NOTICE: <log desc> prints
// from a file collect.stdout, putting them in the logs data directories as
// notice.txt.  Only meant to migrate away from v0.0.1 that did not store
// per-log notice files automatically, which makes things less error-prone.
package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	logger "log"
	"os"
	"strings"

	"gitlab.torproject.org/rgdd/ct/pkg/metadata"
)

func main() {
	directory := "../data"
	logDirectory := fmt.Sprintf("%s/logs", directory)
	noticeFile := "../collect.stdout"

	b, err := os.ReadFile(fmt.Sprintf("%s/metadata.json", directory))
	if err != nil {
		logger.Fatal(err)
	}
	var md metadata.Metadata
	if err := json.Unmarshal(b, &md); err != nil {
		logger.Fatal(err)
	}...