Separate the options --ignore-errors and --no-abort-on-error

In youtube-dl, `-i` ignores both download and post-processing error, and
treats the download as successful even if the post-processor fails.

yt-dlp used to skip the entire video on either error and there was no
option to ignore the post-processing errors like youtube-dl does.

By splitting the option into two, now either just the download errors
(--no-abort-on-error, default on CLI) or all errors (--ignore-errors)
can be ignored as per the users' needs

Closes #893

yt_dlp/postprocessor/xattrpp.py

@@ -57,8 +57,7 @@ class XAttrMetadataPP(PostProcessor):
             return [], info
 
         except XAttrUnavailableError as e:
-            self.report_error(str(e))
-            return [], info
+            raise PostProcessingError(str(e))
 
         except XAttrMetadataError as e:
             if e.reason == 'NO_SPACE':
@@ -74,5 +73,5 @@ class XAttrMetadataPP(PostProcessor):
                     msg += 'You need to use NTFS.'
                 else:
                     msg += '(You may have to enable them in your /etc/fstab)'
-                self.report_error(msg)
+                raise PostProcessingError(str(e))
             return [], info