fix: cleanup handler for task after completion

[nazarhussain]

Motivation

Cleanup handler for tasks after cleanup.

Description

• Assign handler as independant function
• Cleanup handler after the task is finished

Steps to test or reproduce

Run all tests

[github-actions]

Performance Report

✔️ no performance regression detected

Full benchmark results

Benchmark suite	Current: f86677f	Previous: null	Ratio
sum array with raw for loop	933.50 us/op
sum array with reduce	10.201 ms/op
sum array with reduce beforeEach	9.7574 ms/op
sum array with reduce before beforeEach	9.9443 ms/op
sum array with reduce high threshold	10.076 ms/op
sum array with reduce no threshold	9.9902 ms/op

by benchmarkbot/action