hls-plugin: destroy hls upon third err

According to hls.js docs `hls.destroy()` should be called
https://github.com/video-dev/hls.js/blob/master/docs/API.md#final-step-destroying-switching-between-streams

client/src/assets/player/p2p-media-loader/hls-plugin.ts

@@ -226,6 +226,7 @@ class Html5Hlsjs {
 
     if (this.errorCounts[ Hlsjs.ErrorTypes.MEDIA_ERROR ] > 2) {
       console.info('bubbling media error up to VIDEOJS')
+      this.hls.destroy()
       this.tech.error = () => error
       this.tech.trigger('error')
       return