[extractor] Allow control characters inside json

Closes #3174

yt_dlp/extractor/common.py

@@ -1033,7 +1033,7 @@ class InfoExtractor(object):
         if transform_source:
             json_string = transform_source(json_string)
         try:
-            return json.loads(json_string)
+            return json.loads(json_string, strict=False)
         except ValueError as ve:
             errmsg = '%s: Failed to parse JSON ' % video_id
             if fatal: