ARROW-7897: [Packaging] Temporarily disable artifact uploading until …

…we fix the deployment issues

This will filter out the false negatives from the nightly build report until we fix the deployment errors in #6458

Closes #6468 from kszucs/turn-off-crossbow-uploading and squashes the following commits:

ec6eb26 <Krisztián Szűcs> turn off uploading

Authored-by: Krisztián Szűcs <szucs.krisztian@gmail.com>
Signed-off-by: Neal Richardson <neal.p.richardson@gmail.com>

dev/tasks/crossbow.py

@@ -1528,10 +1528,13 @@ def asset_callback(task_name, task, asset):
               help='File pattern to upload as assets')
 @click.pass_obj
 def upload_artifacts(obj, tag, sha, patterns):
-    queue = obj['queue']
-    queue.github_overwrite_release_assets(
-        tag_name=tag, target_commitish=sha, patterns=patterns
-    )
+    # queue = obj['queue']
+    # queue.github_overwrite_release_assets(
+    #     tag_name=tag, target_commitish=sha, patterns=patterns
+    # )
+    # HACK: turn off artifact uploading globally until we resolve the github
+    # API related issues in https://github.com/apache/arrow/pull/6458
+    return
 
 
 if __name__ == '__main__':