FSharp.Core collection functions for Array.Parallel more regular

[T-Gro]

This is covering the fslang suggestion fsharp/fslang-suggestions#187

In F# 3.0, lots of standard functions are missing from Array.Parallel including

Sorting: #14820

sort
sortBy
sortByDescending
sortWith
sortWithDescending
sortInPlaceBy
sortInPlaceWith
sortInPlace

Searching: #14827

TryFind
TryFindIndex
TryPick

Aggregations: #14924

Sum
MaxBy
MinBy

Reduce

Logical tests #14910

Exists
ForAll

Transformations

Filter #14916
GroupBy #14895
Zip #14916