[Response Ops] Scope Privilege for ServiceNow SIR

[XavierM]

When testing a new SIR instance from service now, we realized that we need to add privilege's scope for our application Elastic for Security Operations. We should add in the documentation these steps to make sure that our Elastic for Security Operations app is working correctly under service now for our user.

First, you will need to pick the application scope: Elastic for Security Operations.

Then, in the ALL category you can search for sys_scope_privilege_list and type `ENTER

Verify that you have all the same privileges than below to have Elastic for Security Operations to work correctly

[elasticmachine]

Pinging @elastic/response-ops (Team:ResponseOps)

[cnasikas]

You must search for sys_scope_privilege.list and press Enter to see the cross scope privilege table. Nevertheless, we should only document which cross scope privileges are needed. They can refer to the SN documentation of how to do it.

[lcawl]

For the full table of privileges required, see #172533 (comment)