Fixes #161421 ## Summary As mentioned in the linked issue, I migrated all usages of `EuiPage*_Deprecated` components listed below: [x-pack/triggers_actions_ui](https://github.com/search?q=repo%3Aelastic%2Fkibana+%2FEuiPage%5Ba-zA-Z%5D%2B_Deprecated%2F+path%3A%2F%5Ex-pack%5C%2Fplugins%5C%2Ftriggers_actions_ui%2F&type=code) [x-pack/examples/triggers_actions_ui_examples](https://github.com/search?q=repo%3Aelastic%2Fkibana+%2FEuiPage%5Ba-zA-Z%5D%2B_Deprecated%2F+path%3A%2F%5Ex-pack%5C%2Fexamples%5C%2Ftriggers_actions_ui_example%2F&type=code) [x-pack/examples/alerting_example](https://github.com/search?q=repo%3Aelastic%2Fkibana+%2FEuiPage%5Ba-zA-Z%5D%2B_Deprecated%2F+path%3Ax-pack%2Fexamples%2Falerting_example&type=code) [x-pack/test/functional_with_es_ssl/plugins/cases](https://github.com/search?q=repo%3Aelastic%2Fkibana+%2FEuiPage%5Ba-zA-Z%5D%2B_Deprecated%2F+path%3Ax-pack%2Ftest%2Ffunctional_with_es_ssl%2Fplugins%2Fcases&type=code) The majority of these were in test environments and examples. The only one actually in `x-pack/triggers_actions_ui` had to do with the rule detail page. It looked basically the same after the change but a `Pager` that was there became unnecessary. I removed it.
