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.

appeared in<not specified>
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]