Revert "skip failing configs (elastic#195811)" (elastic#195890)

## Summary

This PR re-enables the serverless deployment agnostic tests

### Details

- The root cause of the problem should be fixed with elastic#195563
- This reverts commit 8d1bc50

Closes elastic#195811

.buildkite/ftr_oblt_serverless_configs.yml

@@ -6,10 +6,6 @@ disabled:
   - x-pack/test_serverless/functional/test_suites/observability/cypress/config_headless.ts
   - x-pack/test_serverless/functional/test_suites/observability/cypress/config_runner.ts
 
-    # serverless config files that run deployment-agnostic tests
-    # Failing https://github.com/elastic/kibana/issues/195811
-  - x-pack/test/api_integration/deployment_agnostic/configs/serverless/oblt.serverless.config.ts
-
 defaultQueue: 'n2-4-spot'
 enabled:
   - x-pack/test_serverless/api_integration/test_suites/observability/config.ts
@@ -29,3 +25,5 @@ enabled:
   - x-pack/test_serverless/functional/test_suites/observability/common_configs/config.group5.ts
   - x-pack/test_serverless/functional/test_suites/observability/common_configs/config.group6.ts
   - x-pack/test_serverless/functional/test_suites/observability/config.screenshots.ts
+  # serverless config files that run deployment-agnostic tests
+  - x-pack/test/api_integration/deployment_agnostic/configs/serverless/oblt.serverless.config.ts

.buildkite/ftr_search_serverless_configs.yml

@@ -1,10 +1,6 @@
 disabled:
   # Base config files, only necessary to inform config finding script
 
-  # serverless config files that run deployment-agnostic tests
-  # Failing https://github.com/elastic/kibana/issues/195811
-  - x-pack/test/api_integration/deployment_agnostic/configs/serverless/search.serverless.config.ts
-
 defaultQueue: 'n2-4-spot'
 enabled:
   - x-pack/test_serverless/api_integration/test_suites/search/config.ts
@@ -22,3 +18,5 @@ enabled:
   - x-pack/test_serverless/functional/test_suites/search/common_configs/config.group4.ts
   - x-pack/test_serverless/functional/test_suites/search/common_configs/config.group5.ts
   - x-pack/test_serverless/functional/test_suites/search/common_configs/config.group6.ts
+  # serverless config files that run deployment-agnostic tests
+  - x-pack/test/api_integration/deployment_agnostic/configs/serverless/search.serverless.config.ts

.buildkite/ftr_security_serverless_configs.yml

@@ -20,10 +20,6 @@ disabled:
   - x-pack/test_serverless/functional/config.base.ts
   - x-pack/test_serverless/shared/config.base.ts
 
-  # serverless config files that run deployment-agnostic tests
-  # Failing https://github.com/elastic/kibana/issues/195811
-  - x-pack/test/api_integration/deployment_agnostic/configs/serverless/security.serverless.config.ts
-
 defaultQueue: 'n2-4-spot'
 enabled:
   - x-pack/test_serverless/api_integration/test_suites/security/config.ts
@@ -104,3 +100,5 @@ enabled:
   - x-pack/test/security_solution_api_integration/test_suites/edr_workflows/response_actions/trial_license_complete_tier/configs/serverless.config.ts
   - x-pack/test/security_solution_endpoint/configs/serverless.endpoint.config.ts
   - x-pack/test/security_solution_endpoint/configs/serverless.integrations.config.ts
+  # serverless config files that run deployment-agnostic tests
+  - x-pack/test/api_integration/deployment_agnostic/configs/serverless/security.serverless.config.ts