In the platform-admin "all organizations" view, add an organization picker
(the CreateOrgScopeField slot) to the SSH public key, storage type,
storage, GPU instance and instance-template create forms, placed below the
name / display-name fields. Drop the hidden owner field and let the owner
derive from the request context, matching the model-route form.
For GPU instances, scope the instance-type list to clusters the chosen org
owns (client-side, by cluster owner) so an instance can't be scheduled onto
another org's cluster; when the org owns none, show "no instance type
available" and clear the selection, cluster and CPU/memory fields. Instance
templates gain a Global level (NULL owner) and an owner tag on the card.
Two changes that together restore the per-row Edit / Delete menu
for non-admin users:
- ``templateActions`` drops the blanket ``access: 'canSeeAdmin'``
gate on every menu item. With the gate on, non-admin callers got
an empty filtered menu, so clicking the "..." did nothing.
- The management page passes ``mine=true`` to the list API. The
endpoint now drops Global rows for non-admin callers (rows they
can't edit anyway), so the dropdown shows up only on rows the
caller may manage. The GPU-instance create picker reuses the
same API without ``mine``, keeping Global presets visible there.
