Parallelize Node Evaluations

[hamersaw]

TL;DR

This PR parallelizes node evaluations by using go channels to call the handleNode function in a separate go routine and then waiting on all evaluations before compiling overall workflow status.

Type

• Bug Fix
• Feature
• Plugin

Are all requirements met?

• Code completed
• Smoke tested
• Unit tests added
• Code documentation added
• Any pending items have an associated Issue

Complete description

^^^

Tracking Issue

fixes flyteorg/flyte#3866

Follow-up issue

NA

[eapolinario]

Hi, we are moving all Flyte development to a monorepo. In order to help the transition period, we're moving open PRs to monorepo automatically and your PR was moved to flyteorg/flyte#4155. Notice that if there are any conflicts in the resulting PR they most likely happen due to the change in the import path of the flyte components.