Add migrate repo archiver and packages storage support on command line (#20757)
* Add migrate repo archiver and packages storage support on command line
* Fix typo
* Use stdCtx
* Use packageblob and fix command description
* Add migrate packages unit tests
* Fix comment year
* Fix the migrate storage command line description
* Update cmd/migrate_storage.go
Co-authored-by: zeripath <art27@cantab.net>
* Update cmd/migrate_storage.go
Co-authored-by: zeripath <art27@cantab.net>
* Update cmd/migrate_storage.go
Co-authored-by: zeripath <art27@cantab.net>
* Fix test
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: zeripath <art27@cantab.net>