vat details and test dry no rm

[mhofman]

@agoric/synthetic-chain library

• Add some util I needed in Split-up portfolio-deploy and support contract name agoric-sdk#12038 to get more vat details
• Do not rm the test image in dry mode

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
packages/synthetic-chain/src/cli/cli.ts	75% smaller
.changeset/late-deer-give.md	Unsupported file format
.changeset/wise-rocks-battle.md	Unsupported file format
packages/synthetic-chain/src/lib/vat-status.js	0% smaller
packages/synthetic-chain/test/snapshots/test-exports.ts.md	Unsupported file format
packages/synthetic-chain/test/snapshots/test-exports.ts.snap	Unsupported file format

[changeset-bot]

🦋 Changeset detected

Latest commit: 4790777

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@agoric/synthetic-chain	Patch

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[turadg]

Lgtm but add changeset entries before merging