You can't just simply check the message.content inside the execute method. It will never be ?stopp as execute only called when you send the image command (i.e. ?image search term).

What you can do instead is to set up a new message collector in the same channel and check if the incoming message is your stop command. In my example below I used createMessageCollector. I've also added plenty of comments.

const google = new Scraper({
  puppeteer: {
    headless: true,
  },
});

module.exports = {
  name: 'image',
  description: 'Sends profile pics',
  async execute(kaoru, message, args, Discord) {
    const query = args.join(' ');

    if (!query)
      return message.channel.send('**Please enter name of the image!**');

    const results = await google.scrape(query, 100);

    // also send error message if there are no results
    if (!results?.length) return message.channel.send('**No image found!**');

    // you probably want to send the first image right away
    // and not after 10 seconds
    const image = results[Math.floor(Math.random() * results.length)];
    message.channel.send(image.url);

    let intervalID = setInterval(() => {
      // you don't need to add +1 and take away 1, it's unnecessary
      // also, use results.length instead of the hardcoded 100
      // as if there are no 100 results, it will throw an error
      const image = results[Math.floor(Math.random() * results.length)];
      message.channel.send(image.url);
    }, 10000);

    // use this filter to only collect message if...
    const filter = (m) =>
      // the author is the same as the user who executed the command
      m.author.id === message.author.id &&
      // and the message content is ?stopp
      m.content.toLowerCase() === '?stopp';

    // set up a message collector
    const collector = message.channel.createMessageCollector({
      // use the filter above
      filter,
      // you only need to collect a single message
      max: 1,
    });

    // it fires when a message is collected
    collector.on('collect', (collected) => {
      clearInterval(intervalID);
      // message.reply won't work as message is no longer available
      message.channel.send('Pinging successfully stopped!');
    });

    message.delete();
  }
};