[Sentinel One] - Fix Cannot execute ILM policy delete step for threat event (elastic#137222)

This PR introduces a short-term solution by adding the logs-sentinel_one.threat_event-* indices to the kibana_system role with delete privileges. This prevents deletion failures when the index enters the ILM deletion phase. Since the transform pipeline is also shipped as part of this change, the role requires additional read and write permissions.

Author: mohitjha-elastic

docs/changelog/137222.yaml

@@ -0,0 +1,6 @@
+pr: 137222
+summary: "[Sentinel One] Add `manage`, `create_index`, `read`, `index`, `write`, `delete`, permission for third-party agent indices in the `Kibana system` to support the threat event data stream."
+area: Authorization
+type: enhancement
+issues:
+  - 240901

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/security/authz/store/KibanaOwnedReservedRoleDescriptors.java

@@ -550,14 +550,15 @@ static RoleDescriptor kibanaSystem(String name) {
                         TransportDeleteIndexAction.TYPE.name()
                     )
                     .build(),
-                // For ExtraHop, QualysGAV, SentinelOne Application Dataset, Island Browser and Cyera specific actions.
+                // For ExtraHop, QualysGAV, SentinelOne, Island Browser and Cyera specific actions.
                 // Kibana reads, writes and manages this index
                 // for configured ILM policies.
                 RoleDescriptor.IndicesPrivileges.builder()
                     .indices(
                         "logs-extrahop.investigation-*",
                         "logs-qualys_gav.asset-*",
                         "logs-sentinel_one.application-*",
+                        "logs-sentinel_one.threat_event-*",
                         "logs-island_browser.user-*",
                         "logs-island_browser.device-*",
                         "logs-cyera.classification-*",

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/security/authz/store/ReservedRolesStoreTests.java

@@ -1984,6 +1984,7 @@ public void testKibanaSystemRole() {
             "logs-extrahop.investigation-" + randomAlphaOfLength(randomIntBetween(1, 10)),
             "logs-qualys_gav.asset-" + randomAlphaOfLength(randomIntBetween(1, 10)),
             "logs-sentinel_one.application-" + randomAlphaOfLength(randomIntBetween(1, 10)),
+            "logs-sentinel_one.threat_event-" + randomAlphaOfLength(randomIntBetween(1, 10)),
             "logs-island_browser.user-" + randomAlphaOfLength(randomIntBetween(1, 10)),
             "logs-island_browser.device-" + randomAlphaOfLength(randomIntBetween(1, 10)),
             "logs-cyera.classification-" + randomAlphaOfLength(randomIntBetween(1, 10)),