### Description

**Background**
As part of https://github.com/elastic/kibana/issues/104986 we will be adding the ability for Elastic Agents to send agent monitoring data to a remote Elasticsearch cluster. In order to achieve this, we will need a service token for the remote cluster which fleet server will use. 

This service account will need less permissions than the `elastic/fleet-server` as integration data will not be sent to remote clusters yet.

**Service Account Details**

Name: `elastic/fleet-server-remote`

Permissions:
-  for indices `logs-*`, `metrics-*` privileges "write", "create_index", "auto_configure"

x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authc/service/ElasticServiceAccounts.java
+ roleDescriptor.getName()
                        + "] must have the same name as the service account ["
                        + id.asPrincipal()
                        + "]"
                );
            }
            this.user = new User(
                id.asPrincipal(),
                Strings.EMPTY_ARRAY,
                "Service account - " + id,
                null,
                Map.of("_elastic_service_account", true),
                true
            );
        }
        @Override
        public ServiceAccountId id() {
            return id;
        }
        @Override
        public RoleDescriptor roleDescriptor() {
            return roleDescriptor;
        }
        @Override
        public User asUser() {
            return user;
        }
    }
}