csv-generator: Populate name field in relatedImages entries

[nirdothan]

Summary

Fixes the relatedImages generation to populate both image and name fields, preventing empty name entries in the merged HCO CSV.

Problem

The buildRelatedImages() function introduced in #158 was creating RelatedImage entries with only the image field populated, leaving the name field empty:

relatedImages:
- image: registry.redhat.io/openshift4/ose-sriov-dp-admission-controller-rhel9@sha256:...

When the HCO bundle merge-manifests task combined all operator CSVs, this resulted in entries with name: "" in the final CSV, which is inconsistent with the expected HCO CSV format.

Solution

Updated buildRelatedImages() to set the Name field to the same value as the Image field for both the operator image and all additional images:

relatedImages:
- image: registry.redhat.io/openshift4/ose-sriov-dp-admission-controller-rhel9@sha256:...
  name: registry.redhat.io/openshift4/ose-sriov-dp-admission-controller-rhel9@sha256:...

This ensures consistency across all operator CSVs in the HCO bundle.

Changes

• Modified buildRelatedImages() in cmd/csv-generator/main.go to populate the Name field
• Updated all test cases in cmd/csv-generator/related_images_test.go to verify the correct behavior

Testing

All existing tests pass with the updated expectations.

$ go test ./cmd/csv-generator/... -v -run TestBuildRelatedImages
=== RUN   TestBuildRelatedImages
=== RUN   TestBuildRelatedImages/operator_image_only
=== RUN   TestBuildRelatedImages/operator_image_with_empty_additional_images_slice
=== RUN   TestBuildRelatedImages/operator_image_with_one_additional_image
=== RUN   TestBuildRelatedImages/operator_image_with_multiple_additional_images
--- PASS: TestBuildRelatedImages (0.00s)
PASS

[nirdothan]

/cc @tiraboschi