Build a file-based catalog

[clobrano]

Why we need this PR

Currently NHC's Makefile creates a db-based catalog, which is deprecated

DEPRECATION NOTICE:
Sqlite-based catalogs and their related subcommands are deprecated. Support for
them will be removed in a future release. Please migrate your catalog workflows
to the new file-based catalog format.

Changes made

This change creates a file-based catalog

https://docs.openshift.com/container-platform/4.14/operators/admin/olm-managing-custom-catalogs.html#olm-managing-custom-catalogs-fb

Which issue(s) this PR fixes

https://issues.redhat.com/browse/ECOPROJECT-1948

Test plan

• create the file-based catalog and push it to my quay.io repository via Makefile
• create a CatalogSource pointing to the new catalog
• install FAR via WebUI, verify that everything works