Backend Migration Docs for Microsoft Graph Entity Provider

Added section to the migration guide specifically around how to migrate the Microsoft Graph Entity Provider.

Updated current documentation to recommend setting schedule in config rather than code.
Whilst not strictly nessescarry for the migration docs, documenting this way of setting the schedule eases migrations later (since the new backend system only allows setting schedules via config and not code)

Signed-off-by: Alex Crome <afscrome@users.noreply.github.com>

docs/integrations/azure/org.md

@@ -34,6 +34,9 @@ catalog:
             securityEnabled eq false
             and mailEnabled eq true
             and groupTypes/any(c:c+eq+'Unified')
+        schedule:
+          frequency: PT1H
+          timeout: PT50M
 ```
 
 Finally, register the plugin in `catalog.ts`.
@@ -52,11 +55,7 @@ export default async function createPlugin(
   builder.addEntityProvider(
     MicrosoftGraphOrgEntityProvider.fromConfig(env.config, {
       logger: env.logger,
-      schedule: env.scheduler.createScheduledTaskRunner({
-        frequency: { hours: 1 },
-        timeout: { minutes: 50 },
-        initialDelay: { seconds: 15 },
-      }),
+      scheduler: env.scheduler,
     }),
   );
   /* highlight-add-end */