useExecutionRoot.spec.ts, ExecutionVariableExplorer.spec.ts: replace explicit any with real types #20321

6 explicit any across 2 files in ui/tests/unit, from ui/scripts/explicit-any/baseline.json.

Split out of #20066, which now covers logsWrapperCursor.spec.ts only.

How to work on it, where the types come from, what the typing will surface and what to do when you open the PR, is on the epic: #19266