Revert "Adding manage_ml (#108262)" (#108371)

Reverts #108262

Accidentally merged the above PR without security's approval. They asked
us to revert for now and we'll continue discussing on a new PR.

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

@@ -69,7 +69,6 @@ static RoleDescriptor kibanaSystem(String name) {
                 // For Fleet package upgrade
                 "manage_pipeline",
                 "manage_ilm",
-                "manage_inference",
                 // For the endpoint package that ships a transform
                 "manage_transform",
                 InvalidateApiKeyAction.NAME,