The analyze command already provides default values for sampleSize and numChunks when not specified by the user. We should also provide a default samplingMethod using the value of the knob internalQuerySamplingCEMethod instead of erroring if it's not provided. This will make it possible to run a default analyze command that will be guaranteed to be picked up on the read path since it will use the same default values that are passed into/calculated in the sampling estimator.