feat: add cli flag to trigger gc

[nazarhussain]

Motivation

Add CLI to trigger GC to have consistent memory usage across different runs.

Description

• Add CLI flag to trigger GC

Steps to test or reproduce

• Run all tests

[github-actions]

Performance Report

✔️ no performance regression detected

Full benchmark results

Benchmark suite	Current: 06e2589	Previous: null	Ratio
sum array with raw for loop	933.11 us/op
sum array with reduce	10.289 ms/op
sum array with reduce beforeEach	10.246 ms/op
sum array with reduce before beforeEach	10.335 ms/op
sum array with reduce high threshold	10.195 ms/op
sum array with reduce no threshold	10.229 ms/op

by benchmarkbot/action