cutter: Fix errors due to unsupported cut type not being handled correctly

Previously, determining the correct cut type and setting up the cut iterator
wasn't an operation we expected to be able to fail.
It happened outside all error handling blocks.

However, due to the multi-range work, this can now fail if we are requesting
an unsupported combination of transitions and cut type.

In order to correctly handle this like other cut errors, ie. set to UNEDITED
and set error column, we move this logic into the upload_wrapper right before we iterate
through the resulting cut.

cutter/cutter/main.py

@@ -325,24 +325,6 @@ class Cutter(object):
 		upload_backend = self.upload_locations[job.upload_location]
 		self.logger.info("Cutting and uploading job {} to {}".format(format_job(job), upload_backend))
 
-		if upload_backend.encoding_settings is None:
-			self.logger.debug("No encoding settings, using fast cut")
-			if any(transition is not None for transition in job.video_transitions):
-				raise ValueError("Fast cuts do not support complex transitions")
-			cut = fast_cut_segments(job.segment_ranges, job.video_ranges)
-		else:
-			self.logger.debug("Using encoding settings for {} cut: {}".format(
-				"streamable" if upload_backend.encoding_streamable else "non-streamable",
-				upload_backend.encoding_settings,
-			))
-			if len(job.video_ranges) > 1:
-				raise ValueError("Full cuts do not support multiple ranges")
-			range = job.video_ranges[0]
-			cut = full_cut_segments(
-				job.segment_ranges[0], range.start, range.end,
-				upload_backend.encoding_settings, stream=upload_backend.encoding_streamable,
-			)
-
 		# This flag tracks whether we've told requests to finalize the upload,
 		# and serves to detect whether errors from the request call are recoverable.
 		finalize_begun = False
@@ -389,6 +371,24 @@ class Cutter(object):
 			nonlocal finalize_begun
 
 			try:
+				if upload_backend.encoding_settings is None:
+					self.logger.debug("No encoding settings, using fast cut")
+					if any(transition is not None for transition in job.video_transitions):
+						raise ValueError("Fast cuts do not support complex transitions")
+					cut = fast_cut_segments(job.segment_ranges, job.video_ranges)
+				else:
+					self.logger.debug("Using encoding settings for {} cut: {}".format(
+						"streamable" if upload_backend.encoding_streamable else "non-streamable",
+						upload_backend.encoding_settings,
+					))
+					if len(job.video_ranges) > 1:
+						raise ValueError("Full cuts do not support multiple ranges")
+					range = job.video_ranges[0]
+					cut = full_cut_segments(
+						job.segment_ranges[0], range.start, range.end,
+						upload_backend.encoding_settings, stream=upload_backend.encoding_streamable,
+					)
+
 				for chunk in cut:
 					yield chunk
 			except Exception as ex: