[Security Solution] [Flaky test] Fix double ftr test flakiness (elast…

…ic#162990)

## Summary

- Addresses elastic#155122

## Investigations

 *First attempt*

> While investigating the three failing pipelines and examining the
Artifacts, specifically target/test_failures/*.log, I discovered the
root cause to be
> Did not get an expected 200 "ok" when waiting for a list item
(waitForListItem) yet. Retrying until we get a 200 "ok". body:
{"message":"list_id: \"list_items.txt\" item of 1.0 does not
exist","status_code":404}, status: 404
>
>
![image](https://github.com/elastic/kibana/assets/12671903/ad3c4db9-e340-42c0-8a61-63e5387b9b83)
>

*Second attempt*

> Upon incorporating additional logs to pinpoint the underlying issue,
it was realized that the test will persist in its attempts until the
preceding error is rectified, and it was determined that the
list_items.txt file contains the correct item once located.
>
> The problem seemed to be associated with incomplete indexing of all
indices signalsOpen.hits.hits when the test verifies against the
anticipated value.
>
> To investigate the matter, two iterations were conducted, totaling 490
attempts. During these iterations, logs, and warnings were deliberately
inserted to facilitate the tracing of the issue.
>
>
https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/2770#0189bb29-c258-4586-986a-2ac5e128eb52
>
https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/2768#0189baeb-8f09-488e-936f-69e72d089787
>
> In this
[Atifact](https://s3.amazonaws.com/buildkiteartifacts.com/e0f3970e-3a75-4621-919f-e6c773e2bb12/fedcad1e-0f36-4d55-bdc7-e1edbecf91fe/0189bb29-495f-4b7e-b34e-558ff6c02ce2/0189bb29-c258-4586-986a-2ac5e128eb52/target/test_failures/0189bb29-c258-4586-986a-2ac5e128eb52_d98d35afa0abd1ad03e28a68882291c4.log?response-content-type=text%2Fplain&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAQPCP3C7LXS7MSJGH%2F20230808%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20230808T102039Z&X-Amz-Expires=600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEOH%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLWVhc3QtMSJHMEUCIQDYG9De6RYDlVNcO0JGqO6Qc4dpzCQG1s%2BgaXTSimWc9QIgfkZgXlnVcScJCO56vz2VQx1buVTNEDEaVYhYmDgupEgq%2BgMIiv%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARAAGgwwMzIzNzk3MDUzMDMiDOz2Gl2kfcuTHVaWyirOA4iHfkFBI7KBoy%2F97CuLMAxGLNIR8h4FtLCsY664lMhgDGd%2FBVi82zu%2B2Y5DAGEboOmb7C1q%2FX6CyesjDKP7sknXdfT7q8B4jBRK4QcVw2AAvC9%2BqMeN37eCfRXWT%2FrQAEdaWzxkJxk4BtFcATds3LJmmAlbYOT2L7vItmGzGs%2FnkRYevX%2Fq6hwxWqmOKNNot9hZ9sMJ3TZvGsA3045459BfyfObwIlzb13Pj6V7%2FMyTb87RjQazFiK%2Bb7qOXB%2B7ItaVAcpG7diXzPAif%2F%2FEiJedTHtBVh4LsMIKQtiASbcTh4X90kYtVMUcH%2BSG0B41WjWYPok0C3tHfQnGhGBIbSnqvMGmWgwGlhHNF1G7nIDYyWs32PQ3M3WmTGQuLIwp2hPzk4wFtgH%2FDQPWevRFRT%2FhzYJf05hyBT9BMcST9eeKTqEqs52PhCHDlCgo7K5bGjT86OO16MzEKdA77HRro8GqIh6mgTMyQ5gKpH38ueUWvQZnLix4T5HYw0EyJgRLRfiVIpKcH0jRobaFwKSfSYc%2FZ2FPHsAK31weedhy6tafwU7elNYiAaMRv4AQhB%2FlrGWYd6IjOrdgSFowlkd1m5%2FrYTY3k7%2F8D0vsxgjUETDX9semBjqlAWkLq%2FLaRV5KokMNXfT3lCVNJzpYeN1%2FdnInE%2BQn3Ub86kRgMOfTN2OgDHkuYSKsQ95tFHH49NfRn6rTw8tI2Tjs3pToqp65gCYh9MzUKTd2EWsgqdNn6y%2BbHRGFJxd7cacrX9Ghr4XyNme5aAeWAVYNXSqJ1KIbtWmRcwwhThAJHxWk5%2FoBwScZRUSYGWmkhaxnZXDjXg6LBuH7uZOJjf%2FLuFVdtQ%3D%3D&X-Amz-SignedHeaders=host&X-Amz-Signature=8a44c3a5e3b88b632097dc344ecec1ba6d6cb8e80e10d9058e96883e43d925b5)
>
>
![image](https://github.com/elastic/kibana/assets/12671903/bc58d389-3586-4343-a9f9-9577331d4876)
>
>

## Solution

By modifying the third parameter of the `await
waitForSignalsToBePresent(supertest, log, 1, [id]);` function to a value
of 3 instead of the initial 1, we signify the number of alerts we need
to await before conducting assertions. This change is made to
accommodate the assertion of three alerts being generated, accounting
for the exclusion of a single 1.0 value.

(cherry picked from commit f48d422)

x-pack/test/detection_engine_api_integration/security_and_spaces/group7/exception_operators_data_types/double.ts

@@ -489,7 +489,6 @@ export default ({ getService }: FtrProviderContext) => {
           expect(hits).to.eql([]);
         });
       });
-
       describe('working against string values in the data set', () => {
         it('will return 3 results if we have a list that includes 1 double', async () => {
           await importFile(supertest, log, 'double', ['1.0'], 'list_items.txt');
@@ -508,7 +507,7 @@ export default ({ getService }: FtrProviderContext) => {
             ],
           ]);
           await waitForRuleSuccess({ supertest, log, id });
-          await waitForSignalsToBePresent(supertest, log, 1, [id]);
+          await waitForSignalsToBePresent(supertest, log, 3, [id]);
           const signalsOpen = await getSignalsById(supertest, log, id);
           const hits = signalsOpen.hits.hits.map((hit) => hit._source?.double).sort();
           expect(hits).to.eql(['1.1', '1.2', '1.3']);