[APM] Migrate x-pack/test_serverless/api_integration/test_suites/observability/apm_api_integration/service_maps/service_maps.ts to be deployment-agnostic API tests

[APM] Migrate x-pack/test_serverless/api_integration/test_suites/observability/apm_api_integration/service_maps/service_maps.ts to be deployment-agnostic API tests #124098