Closes #11890: Sync/upload reports & scripts (#12059)

* Initial work on #11890

* Consolidate get_scripts() and get_reports() functions

* Introduce proxy models for script & report modules

* Add add/delete views for reports & scripts

* Add deletion links for modules

* Enable resolving scripts/reports from module class

* Remove get_modules() utility function

* Show results in report/script lists

* Misc cleanup

* Fix file uploads

* Support automatic migration for submodules

* Fix module child ordering

* Template cleanup

* Remove ManagedFile views

* Move is_script(), is_report() into extras.utils

* Fix URLs for nested reports & scripts

* Misc cleanup

netbox/extras/utils.py

@@ -66,3 +66,25 @@ def register_features(model, features):
             raise KeyError(
                 f"{feature} is not a valid model feature! Valid keys are: {registry['model_features'].keys()}"
             )
+
+
+def is_script(obj):
+    """
+    Returns True if the object is a Script.
+    """
+    from .scripts import Script
+    try:
+        return issubclass(obj, Script) and obj != Script
+    except TypeError:
+        return False
+
+
+def is_report(obj):
+    """
+    Returns True if the given object is a Report.
+    """
+    from .reports import Report
+    try:
+        return issubclass(obj, Report) and obj != Report
+    except TypeError:
+        return False