Eliminate weird redundant `globals.d.ts` files

In the course of maintaining the virtual objects stuff, whenever a change to the VatData API happens (which has been happening quite a bit as it’s under active development and evolving), it is necessary to perform coordinated changes to 6 separate globals.d.ts files in 6 separate packages:

packages/xsnap/src/globals.d.ts
packages/deploy-script-support/globals.d.ts
packages/run-protocol/globals.d.ts
packages/ERTP/globals.d.ts
packages/pegasus/globals.d.ts
packages/vats/globals.d.t

With the exception of the xsnap package, all of these files are identical and only declare VatData and its related parts, and even xsnaps’s does little more than that.

This is ludicrous, annoying, and potentially dangerous.

If we can’t get rid of these silly things, can we at least have just one of them in some standard place that everybody else can point to?

[turadg]

For @FUDCo 's particular grief with updating VatData we could import the def from a canonical place. https://github.com/Agoric/agoric-sdk/issues/4255

I’ll assign myself.

[mhofman]

I think this could and should be tackled at the same time as #4560, but there may be a quicker fix.