[CS For Registry] Set SBOM occurrence source to registry_event

Description

1. During SBOM ingestion, create SBOM components with the occurrence.source (sbom_source table) registry_event if SBOM report metadata.tools has registry_event.
2. TODO: Check if storing this info in occurrence.source the table could have a performance impact at the time of filtering.
   1. Done: There won't be any change in performance.

User Impact

No direct user impact as this is a backend implementation.

Non-functional requirements

• Benchmarking: Assess the performance impact of using the newly introduced data for filtering.
• Testing: Add unit tests/specs.

Implementation plan

1. Add a new source type ee/app/models/sbom/source.rb container_scanning_for_registry

2. Introduce new cyclonedx property lib/gitlab/ci/parsers/sbom/cyclonedx_properties.rb

   container_scanning_for_registry:image:name
   container_scanning_for_registry:image:tag
   container_scanning_for_registry::operating_system:name
   container_scanning_for_registry::operating_system:version

3. Use POC to for more details !151552 (diffs)

Verification steps

1. Ingest a SBOM report with metadata.tools as registry event set as a part of [CS For Registry] Set SBOM occurrence source to... (#443634 - closed). This requirement is needed to be changed as source depends on properties and using metadata.tools is like patch.
2. Verify that db records are created as per the requirements.