perf: Optimize generic arg_sort of row-encoding
#16894
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arg_sort of row-encoding
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This will lead to a lot less moves during sorting as the item to swap is now 4 bytes instead of 24. It also saves a full pass from sort tuples to args.
Eventually I want to enable this for all our multicolumn sorts. First I will follow up with fixed with optimizations for row encodings that are guaranteed to be fixed with. For instance sorting by multiple integers.