incremental: introduce GraphQLWrappedResult to avoid filtering (#4026)

following graphql/graphql-spec#1077

now part of the following PR stack, with the laters PRs extracted from
this one

#4026: incremental: introduce GraphQLWrappedResult to avoid filtering
#4050: perf: allow skipping of field plan generation
#4051: perf: introduce completePromisedListItemValue
#4052: refactor: introduce completeIterableValue
#4053: perf: optimize completion loops
#4046: perf: use undefined for empty

Author: yaacovCR