issuers, brands can be registered without all of agoricNamesAdmin

[dckc]

I hope early feedback is useful.
I don't know what priority this issue should be given.

This pattern of requesting all of agoricNamesAdmin to register names that were not known at bootstrap was a necessary work-around as of the original Dec 14, 2022 office hours discussion of granting core-eval powers...

KREAd/agoric/contract/src/proposal/chain-storage-proposal.js

Lines 480 to 482 in beb28dc

	const kindAdmin = (kind) => E(agoricNamesAdmin).lookupAdmin(kind);
	await E(kindAdmin('issuer')).update('KREAdCHARACTER', characterIssuer);

KREAd/agoric/contract/src/proposal/powers.json

Line 8 in beb28dc

"agoricNamesAdmin": true,

But that limitation was addressed in the Jun 9 mainnet1B release that was deployed to mainnet.

• remove well-known-name limitation on reserved brands etc. (1062c0a)
  -- https://github.com/Agoric/agoric-sdk/blob/master/packages/vats/CHANGELOG.md#0140-2023-05-19

So the brands and issuers can be shared using the same pattern as the instance:

KREAd/agoric/contract/src/proposal/chain-storage-proposal.js

Lines 379 to 382 in beb28dc

	instance: {
	// @ts-expect-error bakeSaleKit isn't declared in vats/src/core/types.js
	produce: { [contractInfo.instanceName]: kread },
	},

KREAd/agoric/contract/src/proposal/chain-storage-proposal.js

Lines 477 to 478 in beb28dc

	// Share instance widely via E(agoricNames).lookup('instance', <instance name>)
	kread.resolve(instance);

KREAd/agoric/contract/src/proposal/powers.json

Lines 14 to 17 in beb28dc

	"instance": {
	"produce": {
	"kread": true
	}

This reduces the authority granted to the proposal from all of agoricNamesAdmin (authority to change any entry in any of the instance, brand, etc. nameHubs... and to replace the namehubs altogether) to only the authority to give values for the named entries.

By way of example, see the game1 test contract;

https://github.com/Agoric/agoric-sdk/blob/dc-sw-backport/packages/smart-wallet/test/start-game1-proposal.js#L48-L60

https://github.com/Agoric/agoric-sdk/blob/56850bf9467975959f1bd2bbbb6e50d9d4293789/packages/smart-wallet/test/start-game1-proposal.js#L107-L111