Do not check if the node itself has effects when checking call effects #2732
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Resolves #2729
Description
One of the hidden contracts of Rollup is that when checking if calling an entity has an effect, it is not checked if executing the entity has effects. This was violated by the CallExpression itself which caused an exponential performance degradation when checking for effects of long nested chain calls. This should be a nice performance improvement to tree-shaking overall.