The image file upload code as it is now simply doesn't work - it's
missing several important steps in the file upload process. There is
more information in the fixed issue as to the steps required.
After this change, screenshots will still be attached to slack messages
when external image storage is used with Grafana (an S3 bucket, for
example).
Fixes#50056
(cherry picked from commit 9759eeda17)
Co-authored-by: Joe Blubaugh <joe.blubaugh@grafana.com>
Grot (@grafanabot)
2fc2a15fab