nazca #116942 Speed up the alignset reduction. [validation pending]

It should be interesting to used comprehension list to re-compute the alignset instead of using a temporary list.

Moreover, as the cache is given, doneids can be filled before starting the alignment, so alignset should contain only the non perfectly aligned items.

done in0.2.0
load left0.000
closed by#33cc52731e55 [aligner] Speed up the alignset reduction (closes #116942)
patch[aligner] Speed up the alignset reduction (closes #116942) [applied]