feat: Added AWS_REGION env for ECR images in the ClientServer mode

[trublast]

Description

Scan pods can't pull images from ECR when AWS_REGION variable not set.
Added AWS_REGION environment variable for Amazon Elastic Container Registry images in the ClientServer mode

Checklist

• I've read the guidelines for contributing to this repository.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[CLAassistant]

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[chen-keinan]

@trublast lgtm 🚀 thank you for the contribution