Backend: Backfill data to populate database field `verification_level`

With the verification_level field in the catalog_resource_components table, we now need to backfill the data for the existing records.

Issue title	Link	Relation/Notes
Backend: Add verification_level database field to catalog_resource_components table	#434053 (closed)	Blocks all
Backend: Update metadata collection to ensure verification_level is populated	#434058 (closed)	in parallel
Backend: Backfill data to populate field with verified	This issue	in parallel
Backend: Expose field in GraphQL	#434059 (closed)	in parallel
Backend: create table ci_catalog_verified_namespaces	#439390 (closed)	Blocks #432272 (closed) #433299 (closed)
Frontend: Sort component by "verified author" components	#432272 (closed)	Blocked by #439390 (closed)
Frontend: Display GitLab-maintained and official badges for components	#433299 (closed)	Blocked by #439390 (closed)
Backend: Backfill data to populate partner, community, unverified	#439477 (closed)	We need discussions around this.
Frontend: Create the ability to control a Verified Creator badge for display	#439633 (closed)	Blocked by #439390 (closed)
Backend: Implement search algorithm for recommended		TBD