[SIEM] Error toasters when sorting by rule name on detections page

[FrankHassanabad]

Kibana version:
7.9.0-BC6

This is related to this issue:
#74157

• Go to the detections page.
• Sort by rule name
• Reload your page

If you look at the error toaster you will see this:

The root of the issue looks to be that when timeline mounts its self it is causing initial queries against the sime:defaultIndex and does not have the siem signals:

Later queries will be the correct ones which will be just the siem-signals index and not include these extra indexes on page load. We really want to eliminate duplicate queries of timeline when it first mounts and want to eliminate it from querying the siem:defaultIndex on page load. You do run the risk of the second query taking longer than the first and possibly wrong data on your visualization:

[elasticmachine]

Pinging @elastic/siem (Team:SIEM)