Rename executePreEvaluated to doPreEvaluated to avoid chance of clashes with TruffleDSL

There was apparently one more miss-pick of the TruffleDSL compiler causing problems with the NonLocalReturn micro benchmark.
By renaming it, I can avoid the overlap and miss-picks, I thought I had fixed already.

Signed-off-by: Stefan Marr <git@stefan-marr.de>