* packaging builder initial config

* add release scheduler parameter

* remove stables

* add taskname + test owner

* testowner test

* comment structure

* test naming convention

* test adding tags

* add timeout

* prune names

* Update testowners.

* Move packaging to shards section.

* Set packaging as shard.

* Use packaging V2
Co-authored-by: godofredoc <godofredoc@google.com>