Delete package from :snapshots repository

In our automated Gitlab CI workflow, when an MR is created, the corresponding source package is uploaded to the :snapshots repository.

Later, when the MR is accepted, the corresponding package is directly uploaded to the main repostiory.

This change ensures to clean-up the corersponding package from the :snapshots repository upon acceptance of the MR.

https://phabricator.apertis.org/T6850

Signed-off-by: Ritesh Raj Sarraf ritesh.sarraf@collabora.com