Add Search ALC filter index prefix to the enterprise search user (#96885)

* Add Search ALC filter index prefix to the enterprise search user

* Update docs/changelog/96885.yaml

Author: seanstory

docs/changelog/96885.yaml

@@ -0,0 +1,5 @@
+pr: 96885
+summary: Add Search ALC filter index prefix to the enterprise search user
+area: Authorization
+type: enhancement
+issues: []

x-pack/plugin/security/qa/service-account/src/javaRestTest/java/org/elasticsearch/xpack/security/authc/service/ServiceAccountIT.java

@@ -187,6 +187,7 @@ public class ServiceAccountIT extends ESRestTestCase {
                 {
                     "names": [
                         "search-*",
+                        ".search-acl-filter-*",
                         ".elastic-analytics-collections",
                         ".ent-search-*",
                         ".monitoring-ent-search-*",

x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authc/service/ElasticServiceAccounts.java

@@ -31,6 +31,7 @@ final class ElasticServiceAccounts {
                 RoleDescriptor.IndicesPrivileges.builder()
                     .indices(
                         "search-*",
+                        ".search-acl-filter-*",
                         ".elastic-analytics-collections",
                         ".ent-search-*",
                         ".monitoring-ent-search-*",

x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authc/service/ElasticServiceAccountsTests.java

@@ -390,6 +390,7 @@ public void testElasticEnterpriseSearchServerAccount() {
 
         List.of(
             "search-" + randomAlphaOfLengthBetween(1, 20),
+            ".search-acl-filter-" + randomAlphaOfLengthBetween(1, 20),
             ".elastic-analytics-collections",
             ".ent-search-" + randomAlphaOfLengthBetween(1, 20),
             ".monitoring-ent-search-" + randomAlphaOfLengthBetween(1, 20),