GPL-913 Housekeeping - remove CGaP integration

[Philip Jansen van Vuuren]

Describe the Housekeeping
The slack exception channel keeps getting messages when barcodes are scanned into asset audits which then calls the wrangler to search for these barcodes in the MLWH table which CGaP used to populate.

This functionality is no longer used nor required.

Blocking issues
Describe any other issues or tickets that may be blocking this change.

Additional context
Add any other context about the problem here.