refactor(databricks): migrate to unified folder structure (Azure#37718)

* refactor the folder structure

* resolve conflict

---------

Co-authored-by: Qiaoqiao Zhang <55688292+qiaozha@users.noreply.github.com>

Author: zedy-wj

…eview/2021-04-01-preview/databricks.json …eview/2021-04-01-preview/databricks.jsonspecification/databricks/resource-manager/Microsoft.Databricks/preview/2021-04-01-preview/databricks.json renamed to specification/databricks/resource-manager/Microsoft.Databricks/Databricks/preview/2021-04-01-preview/databricks.json specification/databricks/resource-manager/Microsoft.Databricks/preview/2021-04-01-preview/databricks.json renamed to specification/databricks/resource-manager/Microsoft.Databricks/Databricks/preview/2021-04-01-preview/databricks.json

@@ -713,7 +713,7 @@
           "description": "The system metadata relating to this resource",
           "type": "object",
           "readOnly": true,
-          "$ref": "../../../../../common-types/resource-management/v2/types.json#/definitions/systemData"
+          "$ref": "../../../../../../common-types/resource-management/v2/types.json#/definitions/systemData"
         }
       },
       "required": [