…lastic#50111)

## Summary

* Removes technical debt of name being in the params now that the regular alerting has name as a first class citizen.
* Only creates new signals on an update if it sees that saved objects return 404
* Changes the conversion script of saved searches to rules to be every 5 minutes for tests.
* Changes the logger levels to be mostly quiet by using debug instead of info.
* Small fixes for when we return false for errors on 0 found signals when that is not an error. 
* Added a delete all api keys for more cleanups when developing 

For testing things on the backend this is the `kibana.dev.yml` settings I use for this PR which enables the siem debug but filters out the others and enables additional request information for testing:

```yml
logging.verbose: true
logging.events:
  {
    log: ['siem', 'info', 'warning', 'error', 'fatal'],
    request: ['info', 'warning', 'error', 'fatal'],
    error: '*',
    ops: __no-ops__,
  }
```

### Checklist

Use ~~strikethroughs~~ to remove checklist items you don't feel are applicable to this PR.

~~- [ ] This was checked for cross-browser compatibility, [including a check against IE11](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#cross-browser-compatibility)~~

~~- [ ] Any text added follows [EUI's writing guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses sentence case text and includes [i18n support](https://github.com/elastic/kibana/blob/master/packages/kbn-i18n/README.md)~~

~~- [ ] [Documentation](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#writing-documentation) was added for features that require explanation or tutorials~~

- [x] [Unit or functional tests](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#cross-browser-compatibility) were updated or added to match the most common scenarios

~~- [ ] This was checked for [keyboard-only and screenreader accessibility](https://developer.mozilla.org/en-US/docs/Learn/Tools_and_testing/Cross_browser_testing/Accessibility#Accessibility_testing_checklist)~~

### For maintainers

~~- [ ] This was checked for breaking API changes and was [labeled appropriately](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#release-notes-process)~~

~~- [ ] This includes a feature addition or change that requires a release note and was [labeled appropriately](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#release-notes-process)~~