Add migrate repo archiver and packages storage support on command line (#20757) ...

Add migrate repo archiver and packages storage support on command line (#20757) (#20806)

* 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>
* bug fix

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: zeripath <art27@cantab.net>