* refactor: make GetEmbeddedBuiltinActorsBundle take network bundle name
* update calibnet actor bundle to v12.0.0-rc.2, but include v12.0.0-rc.1 as calibrationnet-buggy.car
* wip: calibnet unbork migration
* calibnet: add buggy miner actor CID to actorMeta
* fix incorrect buggy calibnet manifest
* make UpgradeWatermelonFixHeight a build param
* calibnet patch: check whether network is calibration from init actor state
* add sanity checks to the v12 calibnet patch upgrade
* address review