feat(core): add Owner message for embedding user and organization information

[donch1989]

Because:

• Originally, we used owner_name and owner (structpb) to embed owner information for Console. However, owner is a structpb, and it is not well-formatted. Since we already have dedicated messages for User and Organization, we should utilize these messages.

This commit:

• Adds a new Owner message to wrap the User and Organization messages.
• Removes owner in resource response.
• Marks owner_name in resource response as deprecated. Once the frontend removes it, we'll remove it as well.

[linear]

INS-3664 Use UserProfile or OrganizationProfile message in the pipeline and connector response