Inter Protocol contracts upgradable

[turadg]

For Pismo release the requirement was reachably durable. For the Vaults Release we need upgradability. That requires:

• an automated test for each contract, like the one for coveredCall
• proposal to execute Vaults null upgrade in test nets #7562

This ticket is for the former. Here is the state of inter-protocol contracts as of 2023-05-04, on which this ticket was closed:

filename	status	note
stakeFactory.js	irrelevant	out of release
feeDistributor.js	nondurable	"cron job" with no important state. can terminated and replaced at will.
auctioneer.js	reachably durable	if we need to upgrade we'll write a prepare that can pull out the state
econCommitteeCharter.js	upgradable, untested	worst case we re-invite the EC (see also committee.js durable facets in #7593 )
fluxAggregatorContract.js	upgrade tested
assetReserve.js	upgrade tested
psm.js	upgrade tested
vaultFactory.js	upgrade tested

[dckc]

Let's reconcile the bundles in https://github.com/Agoric/agoric-sdk/blob/6653-vats-pkg-upgrade/packages/inter-protocol/scripts/init-core.js#L42 with the contents of this epic; either remove stuff (like AMM) or add tasks.

(discussion with @warner )