"yarn lint" succeeds even when vscode correctly shows lint errors

[erights]

The hover in the left pane above correctly shows that vatParams is an unused parameter (and therefore should be spelled _vatParams). The right pane shows that when we ran yarn lint in the same directory, it did not complain. Similarly, running yarn lint at the top of agoric-sdk does not complain about this.

[erights]

@michaelfig @turadg I'm guessing when I assigned this to y'all. Please reassign to whoever is appropriate. Thanks.

[erights]

Just another example. This one showing two errors on the left, neither of which is reported on the right. The non-report of the // @ts-expect-error is especially unfortunate, since that's why we switched to it from // @ts-ignore-error in the first place.

[turadg]

Known issue, the solution for which is a big amount of work explicitly deprioritized to after MN-1.