AWS S3 Connector: PowerShell Version Enforcement Prevents Configuration Failures

What Changed

Added PowerShell version check in AWS S3 configuration script requiring PowerShell 7 or higher, with clear error messaging directing users to upgrade.

Security Impact (Visibility & Fidelity)

Prevents connector deployment failures that result in no data ingestion. Customers using outdated PowerShell 5 would experience silent deployment failures leading to complete monitoring blind spots for S3 access logs.

Affected Files

DataConnectors/AWS-S3/ConfigAwsConnector.ps1
DataConnectors/AWS-S3/README.md