[9.4] [EDR Workflows] Skip Endpoint exceptions OR operator Cypress test on MKI (#272066) (#272074)

# Backport

This will backport the following commits from `main` to `9.4`:
- [[EDR Workflows] Skip Endpoint exceptions OR operator Cypress test on
MKI (#272066)](#272066)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT [{"author":{"name":"Gergő
Ábrahám","email":"gergo.abraham@elastic.co"},"sourceCommit":{"committedDate":"2026-06-01T08:26:03Z","message":"[EDR
Workflows] Skip Endpoint exceptions OR operator Cypress test on MKI
(#272066)\n\n## Summary\n\nIt seem that on MKI, we don't run our tests
which use the\n`indexEndpointHosts` task, as it works with internal
indices. Hence,\nthis PR skips on MKI the new Endpoint exceptions OR
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Workflows] Skip Endpoint exceptions OR operator Cypress test on
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Workflows] Skip Endpoint exceptions OR operator Cypress test on MKI
(#272066)\n\n## Summary\n\nIt seem that on MKI, we don't run our tests
which use the\n`indexEndpointHosts` task, as it works with internal
indices. Hence,\nthis PR skips on MKI the new Endpoint exceptions OR
operator tests added\nhere:\n- #266687\n\nBackporting just to keep the
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Workflows] Skip Endpoint exceptions OR operator Cypress test on MKI
(#272066)\n\n## Summary\n\nIt seem that on MKI, we don't run our tests
which use the\n`indexEndpointHosts` task, as it works with internal
indices. Hence,\nthis PR skips on MKI the new Endpoint exceptions OR
operator tests added\nhere:\n- #266687\n\nBackporting just to keep the
test env tags in
sync.","sha":"a77cff7038b5fe022c74dcea273235ceafb53cfc"}},{"branch":"9.4","label":"v9.4.2","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Gergő Ábrahám <gergo.abraham@elastic.co>

Author: kibanamachine

x-pack/solutions/security/plugins/security_solution/public/management/cypress/e2e/artifacts/endpoint_exceptions.cy.ts

@@ -154,7 +154,8 @@ describe(
       });
     });
 
-    describe('OR operator', { tags: ['@ess', '@serverless'] }, () => {
+    // Skipped in Serverless MKI due to interactions with internal indices
+    describe('OR operator', { tags: ['@ess', '@serverless', '@skipInServerlessMKI'] }, () => {
       let endpointData: ReturnTypeFromChainable<typeof indexEndpointHosts> | undefined;
 
       const artifactNameActions: FormAction[] = [