add owner to RegisteredModel logical model

[tarilabs]

In the logical model for RegisteredModel, add property owner of type string.

Note

Sanity checks to work better with local testing while using Podman (5.0.1) has been implemented as part of this PR.

Description

• add to OpenAPI logical model
• regenerate server, Go struct
• implement goverter mappings
• implement unit and integration test on Go side
• align structure in Python client
• implement test in Python client
• implement e2e testing with RobotFramework
• update documentation of logical model

How Has This Been Tested?

• make test for Go
• poetry run pytest for Python

• run RobotFramework manually raising MLMD in docker and running model-registry proxy

Merge criteria:

• The commits and have meaningful messages; the author will squash them after approval or will ask to merge with squash.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[isinyaaa]

lgtm from the python side. thx a lot for the long overdue RM tests as well! much appreciated :)

[rareddy]

/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: isinyaaa, rareddy, tarilabs

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