Improve Docker Image extraction speed for linux ec2 instances

[chawinphat]

Is your feature request related to a problem? Please describe

Docker image extraction can be sped by extracting files in parallel. While Linux extraction time is fast already, parallelizing this process will be a good quality of life change.

Describe the solution you'd like

We can use Pigz instead of Gzip within the al2023 agent's [scripts].(https://github.com/opensearch-project/opensearch-ci/blob/main/packer/scripts/al2023/al2023-agent-setups.sh)

@peterzhuamazon has already done this implementation for the Windows agent instance in this code block.

Describe alternatives you've considered

No response

Additional context

No response

[jordarlu]

Thanks for opening this issue and PR, the community willl review it and comment ... thanks again !!

[peterzhuamazon]

I will add more changes of pigz soon.