[Security Solutions][Detection Engine] Removes side car actions objec…

…t and side car notifications (Part 1) (elastic#109722)

## Summary

Removes the "side car" actions object and side car notification (Part 1). Part 1 makes it so that newly created rules and editing existing rules will update them to using the new side car notifications. Part 2 in a follow up PR will be the migrations to move the existing data. 

The saved object side we are removing usages of is:
```
siem-detection-engine-rule-actions
```

The alerting side car notification system we are removing is:
```
siem.notifications
```

* Removes the notification files and types
* Adds transform to and from alerting concepts of `notityWhen` and our `throttle`
* Adds unit tests for utilities and pure functions created 
* Updates unit tests to have more needed jest mock
* Adds business rules and logic for the different states of `notifyWhen`, and `throttle` on each of the REST routes to determine when we should `muteAll` vs. not muting using secondary API call from client alerting
* Adds e2e tests for the throttle conditions and how they are to interact with the kibana-alerting `throttle` and `notifyWhen`

A behavioral change under the hood is that we now support the state changes of `muteAll` from the UI/UX of [stack management](https://www.elastic.co/guide/en/kibana/master/create-and-manage-rules.html#controlling-rules). Whenever the `security_solution` ["Perform no actions"](https://www.elastic.co/guide/en/security/current/rules-api-create.html
) is selected we do a `muteAll`. However, we do not change the state if all individual actions are muted within the rule. Instead we only maintain the state of `muteAll`:

<img width="2299" alt="ui_state_change" src="https://user-images.githubusercontent.com/1151048/130823045-48a9f34b-db23-44e3-b9ed-cbbb57edc3d6.png">

<img width="1163" alt="no_actions_state_change" src="https://user-images.githubusercontent.com/1151048/130823056-3f8953fa-9433-4973-a2d3-6e11263b9619.png">

Ref:
* Issue and PR where notifyWhen was added to kibna-alerting
  * elastic#82969
  * elastic#50077  

### Checklist

Delete any items that are not applicable to this PR.

- [x] [Unit or functional tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html) were updated or added to match the most common scenarios