[KOM-36] Parallelize GCP & Azure resource fetching

[Azanul]

Problem

Resource fetching performance improvement for GCP and Azure.

Solution

Submitting the tasks to worker pool instead of executing synchronously.

Changes Made

• Updated respective function signatures
• Used providers.WorkerPool.SubmitTask to submit the task to worker pool

Checklist

• Code follows the contributing guidelines
• Changes have been thoroughly tested
• Documentation has been updated, if necessary
• Any dependencies have been added to the project, if necessary