[downloader] Cleanup metadata

[Araxeus]

• Title and artist gets cleaned as before
  (fix downloaded songs having things like (Official Video) in them)

• We now ignore thumbnail that ends with .webp since we can't work with them
  (fix some downloaded songs not having a cover image)

here's an example response that has webp images:

  "basic_info": {
    "id": "dCCXq9QB-dQ",
    "title": "alt-J - Hunger Of The Pine (Official Video)",
    "thumbnail": [
      {
        "url": "https://i.ytimg.com/vi_webp/dCCXq9QB-dQ/hq720.webp",
        "width": 1280,
        "height": 720
      },
      {
        "url": "https://i.ytimg.com/vi/dCCXq9QB-dQ/hq720.jpg?sqp=-oaymwEXCKAGEMIDSFryq4qpAwkIARUAAIhCGAE=&rs=AOn4CLDiJ6pNRAG_kgucwa3TO5-bnrFj1w",
        "width": 800,
        "height": 450
      },
      {
        "url": "https://i.ytimg.com/vi/dCCXq9QB-dQ/hqdefault.jpg?sqp=-oaymwEXCJADEOABSFryq4qpAwkIARUAAIhCGAE=&rs=AOn4CLCqiC42bKeHe7cJXdBe0QvI5XORDw",
        "width": 400,
        "height": 224
      },
      {
        "url": "https://i.ytimg.com/vi_webp/dCCXq9QB-dQ/mqdefault.webp",
        "width": 320,
        "height": 180
      }
    ]
}

Or if you want to see the full response for some reason, It's inside the zip below:

youtubejs-response.zip