feat(organizations): Use owner_label for asset ownership display TASK-1181

[rajpatel24]

📣 Summary

Updated the frontend to read owner_label from the assets endpoint instead of owner__username for displaying the owner field in the asset list.

📖 Description

The owner field in the asset list UI now utilizes the owner_label field from the assets API endpoint.

The owner_label field in the Asset API dynamically displays:

• The username of the asset owner if the organization is not a multi-member organization (MMO).
• The name of the organization if the organization is a multi-member organization (MMO) and the user is the organization owner.

💭 Notes

• Sorting and filtering are not yet updated to work with owner_label instead of owner__username.
• No visual changes or additional functionality were introduced apart from reading and displaying the owner_label.