Integrate gitlab-ci/add-hide-ftp-upload-flag

Commit: seco-ne/yocto/infrastructure/gitlab-ci@a5e27f6e

FTP upload: Add flag to hide FTP upload stage

This is a workaround to prevent customer releases being uploaded to our public FTP area. It should be removed as soon as we support uploading to different FTP target folders.

Source merge request: seco-ne/yocto/infrastructure/gitlab-ci!216 (merged)

mentioned in merge request seco-ne/yocto/infrastructure/gitlab-ci!216 (merged)

merged