[Security Solutions] Fixes 11 different flakey FTR/e2e tests and scen…

…arios (#115688)

## Summary

Fixes flakes across tests that have either been skipped or have been a source of flake in the categories of:
* Sorting fixes because Elasticsearch can return hits/arrays back in different orders
* Flat array fixes because Elasticsearch can sometimes return `[]` or `[[]]` in-deterministically in some cases 🤷 , so we just flatten the array out completely and test for `[]` within those tests.
* `waitForSignalsToBePresent` was missing in a test and sometimes we would get an empty array response which would fail CI.

Also I audited other tests for `[[]]` and `waitForSignalsToBePresent` and fixed them where they were present or if the `waitForSignalsToBePresent` count was incorrect. This should give us more stability when the CI is under pressure.

Sorting fixes:
#115554
#115321
#115319
#114581


Flat array fixes:
#89052
#115315
#115308
#115304
#115313
#113418

Missing additional check for "waitForSignalsToBePresent" or incorrect number of signals to wait for fixes:
#115310


### Checklist

- [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

x-pack/test/detection_engine_api_integration/security_and_spaces/tests/aliases.ts

@@ -51,9 +51,9 @@ export default ({ getService }: FtrProviderContext) => {
       await waitForRuleSuccessOrStatus(supertest, id);
       await waitForSignalsToBePresent(supertest, 4, [id]);
       const signalsOpen = await getSignalsById(supertest, id);
-      const hits = signalsOpen.hits.hits.map(
-        (signal) => (signal._source?.host_alias as HostAlias).name
-      );
+      const hits = signalsOpen.hits.hits
+        .map((signal) => (signal._source?.host_alias as HostAlias).name)
+        .sort();
       expect(hits).to.eql(['host name 1', 'host name 2', 'host name 3', 'host name 4']);
     });
 
@@ -63,7 +63,9 @@ export default ({ getService }: FtrProviderContext) => {
       await waitForRuleSuccessOrStatus(supertest, id);
       await waitForSignalsToBePresent(supertest, 4, [id]);
       const signalsOpen = await getSignalsById(supertest, id);
-      const hits = signalsOpen.hits.hits.map((signal) => (signal._source?.host as HostAlias).name);
+      const hits = signalsOpen.hits.hits
+        .map((signal) => (signal._source?.host as HostAlias).name)
+        .sort();
       expect(hits).to.eql(['host name 1', 'host name 2', 'host name 3', 'host name 4']);
     });
   });