Optimize how the additional row in paginated result is chopped off

[Aniruddh25]

          These rootEnumerated.Count() and rootEnumerated.ToArray() could be optimized ... we actually could allocate a list and then chop the list and would fare better.

Originally posted by @michaelstaib in #1392 (comment)

[Aniruddh25]

Another optimization in how we create the pagination field result:

This is could also be removed JsonSerializer.Serialize(rootEnumerated.ToArray()) in a future PR

#1392 (comment)