add debug views for task manager(s)

implement https://github.com/ansible/awx/issues/12446
in development environment, enable set of views that run
the task manager(s).

Also introduce a setting that disables any calls to schedule()
that do not originate from the debug views when in the development
environment. With guards around both if we are in the development
environment and the setting, I think we're pretty safe this won't get
triggered unintentionally.

use MODE to determine if we are in devel env

Also, move test for skipping task managers to the tasks file

awx/api/views/debug.py

@@ -0,0 +1,68 @@
+from collections import OrderedDict
+
+from django.conf import settings
+
+from rest_framework.permissions import AllowAny
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+from awx.main.scheduler import TaskManager, DependencyManager, WorkflowManager
+
+
+class TaskManagerDebugView(APIView):
+    _ignore_model_permissions = True
+    exclude_from_schema = True
+    permission_classes = [AllowAny]
+    prefix = 'Task'
+
+    def get(self, request):
+        TaskManager().schedule()
+        if not settings.AWX_DISABLE_TASK_MANAGERS:
+            msg = f"Running {self.prefix} manager. To disable other triggers to the {self.prefix} manager, set AWX_DISABLE_TASK_MANAGERS to True"
+        else:
+            msg = f"AWX_DISABLE_TASK_MANAGERS is True, this view is the only way to trigger the {self.prefix} manager"
+        return Response(msg)
+
+
+class DependencyManagerDebugView(APIView):
+    _ignore_model_permissions = True
+    exclude_from_schema = True
+    permission_classes = [AllowAny]
+    prefix = 'Dependency'
+
+    def get(self, request):
+        DependencyManager().schedule()
+        if not settings.AWX_DISABLE_TASK_MANAGERS:
+            msg = f"Running {self.prefix} manager. To disable other triggers to the {self.prefix} manager, set AWX_DISABLE_TASK_MANAGERS to True"
+        else:
+            msg = f"AWX_DISABLE_TASK_MANAGERS is True, this view is the only way to trigger the {self.prefix} manager"
+        return Response(msg)
+
+
+class WorkflowManagerDebugView(APIView):
+    _ignore_model_permissions = True
+    exclude_from_schema = True
+    permission_classes = [AllowAny]
+    prefix = 'Workflow'
+
+    def get(self, request):
+        WorkflowManager().schedule()
+        if not settings.AWX_DISABLE_TASK_MANAGERS:
+            msg = f"Running {self.prefix} manager. To disable other triggers to the {self.prefix} manager, set AWX_DISABLE_TASK_MANAGERS to True"
+        else:
+            msg = f"AWX_DISABLE_TASK_MANAGERS is True, this view is the only way to trigger the {self.prefix} manager"
+        return Response(msg)
+
+
+class DebugRootView(APIView):
+    _ignore_model_permissions = True
+    exclude_from_schema = True
+    permission_classes = [AllowAny]
+
+    def get(self, request, format=None):
+        '''List of available debug urls'''
+        data = OrderedDict()
+        data['task_manager'] = '/api/debug/task_manager/'
+        data['dependency_manager'] = '/api/debug/dependency_manager/'
+        data['workflow_manager'] = '/api/debug/workflow_manager/'
+        return Response(data)