[soundcloud] improve extraction

- improve format extraction(closes #22123)
- extract uploader_id and uploader_url(closes #21916)
- extract all known thumbnails(closes #19071)(closes #20659)
- fix extration for private playlists(closes #20976)
- add support for playlist embeds(#20976)
- skip preview formats(closes #22806)

youtube_dl/extractor/extractors.py

@@ -1033,6 +1033,7 @@
 from .sohu import SohuIE
 from .sonyliv import SonyLIVIE
 from .soundcloud import (
+    SoundcloudEmbedIE,
     SoundcloudIE,
     SoundcloudSetIE,
     SoundcloudUserIE,

youtube_dl/extractor/generic.py

@@ -80,7 +80,7 @@
 from .kaltura import KalturaIE
 from .eagleplatform import EaglePlatformIE
 from .facebook import FacebookIE
-from .soundcloud import SoundcloudIE
+from .soundcloud import SoundcloudEmbedIE
 from .tunein import TuneInBaseIE
 from .vbox7 import Vbox7IE
 from .dbtv import DBTVIE
@@ -2749,9 +2749,9 @@ def _real_extract(self, url):
             return self.url_result(myvi_url)
 
         # Look for embedded soundcloud player
-        soundcloud_urls = SoundcloudIE._extract_urls(webpage)
+        soundcloud_urls = SoundcloudEmbedIE._extract_urls(webpage)
         if soundcloud_urls:
-            return self.playlist_from_matches(soundcloud_urls, video_id, video_title, getter=unescapeHTML, ie=SoundcloudIE.ie_key())
+            return self.playlist_from_matches(soundcloud_urls, video_id, video_title, getter=unescapeHTML)
 
         # Look for tunein player
         tunein_urls = TuneInBaseIE._extract_urls(webpage)