[Issue]: Document hidden Advanced settings

[KOTungseth]

Type of issue

Can't find the information I need.

What documentation page is affected

https://www.elastic.co/docs/manage-data/lifecycle/index-lifecycle-management/configure-lifecycle-policy

What happened?

Our Field teams receive consistent feedback from customers that the Docs are missing important information on how to configure a lifecycle policy. Specifically the hiddenAdvanced settings.

Additional info

This click-through demo, does a good job of clarifying all the settings users need to consider.

[georgewallace]

@kilfoyle Not sure how you want to handle this issue. I added it as a child to your meta issue. This was one of the bits of feedback that was provided to us.

[kilfoyle]

Completed via #1906

The updated Configure a lifecycle policy page shows and describes the advanced settings. Separately, #2178 will fix up the Templates page that explains the settings in more detail.