Add ENABLE_AUTO_EOL flag for images imported to VAT

Description

This MR supports adding a flag for enabling Auto End-Of-Life (EOL) feature in VAT for an image during the VAT job (vat-import.py).

Addresses issue 2070

Risk

Minimal risk. VAT API will gracefully ignore data in the payload that isn't supported yet (enableAutoEOL key)

Rollback Plan

Remove the enableAutoEOL key from the payload being sent to the VAT API.

Testing

Trigger:
Trigger run
Trigger artifacts

Manual pipeline runs:
Fluent-bit
UBI 9 RedHat

The vat_request.json artifact from the VAT job contains the enableAutoEOL flag.