Remove RHEL oscap scan section

Description

Removes section of oscap_scan.sh that was used by the RHEL based pipeline-runner.

• Now that we are using the alpine image we no longer need to pull down seperate images to run oscap scans. The logic to pull down those images has been removed.
• Updated the comments for clarity.
• oscap_scan.sh uses scan_logic.json rather than scan_logic.env now.

Testing

Mario Trigger: Mario_Trigger.zip

After updates:

• Mario_Trigger.2.zip