[Security Solution] Remove hardcoded ids of preconfigured connectors from Security Solution Cypress tests (#217847)

## Summary

[Preconfigured
connectors](https://www.elastic.co/guide/en/kibana/current/pre-configured-connectors.html)
are those that are specified via the `kibana.yml` config, and thus they
can't be deleted. In tests, we've hardcoded their ids to skip deleting
them when we need to clean up the tests' state.

Sometimes, the id of a preconfigured connector gets changed by somebody,
which breaks tests of multiple teams in MKI pipelines, such as the
periodic pipeline or the release quality gates. The problem is that it
doesn't happen on CI where Kibana doesn't have any preconfigured
connectors, so this feedback loop is too long. When tests in an MKI
pipeline break, it's not immediately clear what happened and who should
fix it. Eventually it gets fixed by someone [like
this](https://github.com/elastic/kibana/pull/217570/files).

Instead of hardcoding the ids, we should dynamically determine if a
connector is preconfigured and if it should be deleted by a test or not.
This is possible to do as each connector has the corresponding
`is_preconfigured` property.

<img width="1073" alt="Screenshot 2025-04-10 at 14 16 15"
src="https://github.com/user-attachments/assets/e330cd5f-c9f0-43da-b4b4-f2a0a2fd10a5"
/>

### 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
- [ ] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [x] The PR description includes the appropriate Release Notes section,
and the correct `release_note:*` label is applied per the
[guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

x-pack/test/security_solution_cypress/cypress/tasks/api_calls/common.ts

@@ -25,9 +25,6 @@ export const API_HEADERS = Object.freeze({
   [ELASTIC_HTTP_VERSION_HEADER]: [INITIAL_REST_VERSION],
 });
 
-export const INTERNAL_CLOUD_CONNECTORS = ['Elastic-Cloud-SMTP'];
-export const INTERNAL_INFERENCE_CONNECTORS = ['Elastic-Managed-LLM'];
-
 export const rootRequest = <T = unknown>({
   headers: optionHeaders = {},
   role = 'admin',
@@ -99,30 +96,39 @@ export const getConnectors = () =>
   });
 
 export const deleteConnectors = () => {
+  cy.log('Deleting connectors...');
+
   cy.currentSpace().then((spaceId) => {
     getConnectors().then(($response) => {
-      if ($response.body.length > 0) {
-        const ids = $response.body.map((connector) => {
-          return connector.id;
-        });
-        ids.forEach((id) => {
-          if (
-            !INTERNAL_CLOUD_CONNECTORS.includes(id) &&
-            !INTERNAL_INFERENCE_CONNECTORS.includes(id)
-          ) {
-            rootRequest({
-              method: 'DELETE',
-              url: spaceId
-                ? getSpaceUrl(spaceId, `api/actions/connector/${id}`)
-                : `api/actions/connector/${id}`,
-            });
-          }
-        });
-      }
+      const connectors = $response.body;
+      const connectorNames = connectors.map((c) => c.name);
+
+      cy.log(`Found ${connectors.length} connectors`, connectorNames);
+
+      connectors.forEach((connector) => {
+        deleteConnector(spaceId, connector);
+      });
     });
   });
 };
 
+const deleteConnector = (spaceId: string, connector: AllConnectorsResponse) => {
+  if (connector.is_preconfigured) {
+    // NOTE: Preconfigured connectors can't be deleted.
+    // https://www.elastic.co/guide/en/kibana/current/pre-configured-connectors.html
+    cy.log(`Skipping connector "${connector.name}" as it's preconfigured`);
+    return;
+  }
+
+  cy.log(`Deleting connector "${connector.name}"`);
+  rootRequest({
+    method: 'DELETE',
+    url: spaceId
+      ? getSpaceUrl(spaceId, `api/actions/connector/${connector.id}`)
+      : `api/actions/connector/${connector.id}`,
+  });
+};
+
 export const deletePrebuiltRulesAssets = () => {
   cy.task('deleteSecurityRulesFromKibana');
 };