CoW: Set a bunch of Series copy statements to False
Because the default is now `copy=True` for numpy array input when CoW is enabled, we can explicitly disable copying when we know the data is newly generated.
Thanks! Do you know if there are still many other places as well to further check this, or was this already the result of a more or less full search? I searched in the past already,  I think we got most cases, but wouldn't guarantee 100% coverage No 100% guarantee needed ;) Just to know if we need to actively track this as a further TODO item I don't think so, but I reserve the right to change this statement when we switch over and see a bunch of regressions in the asvs :)