Actually delegate in AbstractDelegateExtent

[SirYwell]

Overview

Description

AbstractDelegateExtent is missing methods that should delegate to the target extent. This leads to falling back to default implementations in Extent that typically perform worse than specialized implementations in the actual extents.
As an example, //distr performs ~15x faster with this change.

I excluded the enableHistory method from delegating because it might delegate to the implementation in ExtentBatchProcessorHolder, returning a SingleThreadQueueExtent instead of the actual ParallelQueueExtent. I don't know why the implementation is built the way it is, so I think this needs to be investigated separately.

Submitter Checklist

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