[SBOM] Remove SBOM information from scan_report table when a SBOM accessory is deleted in registry

[stonezdj]

If a SBOM accessory is deleted, Harbor should remove it from scan_report table by digest and repository information stored in the report column. this logic should be implemented in the internal artifact event hook.

[stonezdj]

Because when delete artifact, it will trigger the delete of the scan_report. it is already done