Add method to test runner to return TServiceParams instead of requiring run

[zoe-codez]

🪤 Context

const { logger } = await testRunner.getParams();

vs

let params: TServiceParams
await testRunner.run(i => params = i);
const { logger } = params; 

🤮

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This probably will have the effect of returning a fully bootstrapped & ready set of params, so .run is required for other stuff