fix image ref keys getting squashed when containing sigs/atts

[amartin120]

Please check below, if the PR fulfills these requirements:

• Commit(s) and code follow the repositories guidelines.
• Test(s) have been added or updated to support these change(s).
• Doc(s) have been added or updated to support these change(s).

Associated Links:

Types of Changes:

• Bugfix

Proposed Changes:

• A recent change removed the KindAnnotationName from a map key of OCI objects, so when an image with a signature and/or attestations were added, the key value used for them matched the image itself so they were getting squashed out of the map.

Verification/Testing of Changes:

• Added an <image:tag> with signatures and attestations.

  • hauler store info showed everything present.
  • hauler store serve registry served fine.
  • hauler store save/load worked appropriately

• Added an <image:sha> with signatures and attestations.

  • hauler store info showed everything present.
  • hauler store serve registry served fine.
  • hauler store save/load worked appropriately

• Added an <image:tag> WITHOUT signatures or attestations.

  • hauler store info showed everything present.
  • hauler store serve registry served fine.
  • hauler store save/load worked appropriately

• Added an <image:sha> WITHOUT signatures or attestations.

  • hauler store info showed everything present.
  • hauler store serve registry served fine.
  • hauler store save/load worked appropriately

Additional Context: