Merge branch '509595-mlflow-load_model-support-for-runs' into 'master'

Model Registry: Support load_model for runs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/177136



Merged-by: Alper Akgun <aakgun@gitlab.com>
Approved-by: Andras Herczeg <aherczeg@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Eduardo Bonet <ebonet@gitlab.com>
Reviewed-by: Alper Akgun <aakgun@gitlab.com>
Reviewed-by: Fred de Gier <fdegier@gitlab.com>
Reviewed-by: Phillip Wells <pwells@gitlab.com>
Reviewed-by: GitLab Duo <gitlab-duo@gitlab.com>
Co-authored-by: fdegier <fdegier@gitlab.com>