Modifying schedules API to allow for rrulesets #5733 (#12043)

* Added schedule_rruleset lookup plugin for awx.awx
* Added DB migration for rrule size
* Updated schedule docs
* The schedule API endpoint will now return an array of errors on rule validation to try and inform the user of all errors instead of just the first

awx/ui/src/components/Schedule/shared/ScheduleForm.js

@@ -11,6 +11,8 @@ import {
   FormGroup,
   Title,
   ActionGroup,
+  // To be removed once UI completes complex schedules
+  Alert,
 } from '@patternfly/react-core';
 import { Config } from 'contexts/Config';
 import { SchedulesAPI } from 'api';
@@ -439,6 +441,34 @@ function ScheduleForm({
 
   if (Object.keys(schedule).length > 0) {
     if (schedule.rrule) {
+      if (schedule.rrule.split(/\s+/).length > 2) {
+        return (
+          <Form autoComplete="off">
+            <Alert
+              variant="danger"
+              isInline
+              ouiaId="form-submit-error-alert"
+              title={t`Complex schedules are not supported in the UI yet, please use the API to manage this schedule.`}
+            />
+            <b>{t`Schedule Rules`}:</b>
+            <pre css="white-space: pre; font-family: var(--pf-global--FontFamily--monospace)">
+              {schedule.rrule}
+            </pre>
+            <ActionGroup>
+              <Button
+                ouiaId="schedule-form-cancel-button"
+                aria-label={t`Cancel`}
+                variant="secondary"
+                type="button"
+                onClick={handleCancel}
+              >
+                {t`Cancel`}
+              </Button>
+            </ActionGroup>
+          </Form>
+        );
+      }
+
       try {
         const {
           origOptions: {