fix(distribution): prevent nil cleanup errors in ErrBlobTransferFailed from causing panics

See merge request !1013

fix(datastore): do not attempt to import manifests with empty layer links

See merge request !1014

fix(storage/driver/gcs): use CRC32C checksums to validate transferred blobs

See merge request !1021

refactor: propagate errors and avoid calls to panic

See merge request !1016

fix(datastore): attempt to import layers before importing manifests

See merge request !1020

fix: avoid logging a misleading warning on 401 response

See merge request gitlab-org/container-registry!1018

chore: fix typo in integration tests

See merge request !1017

chore: log number of tags to process during (pre)imports

See merge request !1023

ci: add dangerfiles for mr hygiene

See merge request !1012

fix(handlers): allow enough time for imports to be canceled before additional pre import attempts

See merge request !1022

fix(importer): handle buildkit index as manifest

See merge request !991

fix(datastore): prevent canceled (pre) imports being marked (pre_)import_complete

See merge request !1024

## [3.41.1](v3.41.0-gitlab...v3.41.1-gitlab) (2022-05-13)

### Bug Fixes

* avoid logging a misleading warning on 401 response ([a36fb76b](a36fb76b))
* **datastore:** attempt to import layers before importing manifests ([f95c6385](f95c6385))
* **datastore:** do not attempt to import manifests with empty layer links ([a1bf8135](a1bf8135))
* **datastore:** prevent canceled (pre) imports being marked (pre_)import_complete ([a224f0b9](a224f0b9))
* **distribution:** prevent nil cleanup errors in ErrBlobTransferFailed from causing panics ([25ebe91a](25ebe91a))
* **handlers:** allow enough time for imports to be canceled before additional pre import attempts ([0deddeb0](0deddeb0))
* **importer:** handle buildkit index as manifest ([774b9ef7](774b9ef7))
* **storage/driver/gcs:** use CRC32C checksums to validate transferred blobs ([f5662162](f5662162))