Dashboards: Add Dashboard Schema validation (2) (#103844)

* Activate schema validation and align underlying systems

* update to save as v0 if not the right schema version

* Resolve merge conflicts

* Move RequireApiErrorStatus to tests package

* Add mutation tests

* Fix lint

* Only do min version check if dashboard is v1

* Fix lint and disable provisioning test

* Revert provisioning changes

* Revert more tests and add schema test

* Reran gen

* SQL Dashboard save

* Adjust APIVERSION

* Fixed mutation test

* Add logging on downgrade

---------

Co-authored-by: Marco de Abreu <18629099+marcoabreu@users.noreply.github.com>
Co-authored-by: Stephanie Hingtgen <stephanie.hingtgen@grafana.com>

pkg/tests/apis/openapi_snapshots/dashboard.grafana.app-v2alpha1.json

@@ -3294,7 +3294,6 @@
         ],
         "properties": {
           "annotations": {
-            "description": "Title of dashboard.",
             "type": "array",
             "items": {
               "default": {},