### 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/test/java/org/elasticsearch/xpack/security/authc/service/ServiceAccountServiceTests.java
"The qualified name of a service token should take format of 'namespace/service_name/token_name'"
                )
            );
            assertNull(
                ServiceAccountService.tryParseToken(new SecureString("AAEAAWVsYXN0aWMvZmxlZXRfdG9rZW4xOnN1cGVyc2VjcmV0".toCharArray()))
            );
            appender.assertAllExpectationsMatched();
            
            appender.addExpectation(
                new MockLogAppender.SeenEventExpectation(
                    "invalid token name again",
                    ServiceAccountService.class.getName(),
                    Level.TRACE,
                    "Cannot parse possible service account token"
                )
            );
            assertNull(
                ServiceAccountService.tryParseToken(new SecureString("AAEAAWVsYXN0aWMvZmxlZXQvdG9rZW4hOnN1cGVyc2VjcmV0".toCharArray()))
            );
            appender.assertAllExpectationsMatched();
            
            assertThat(
                ServiceAccountService.tryParseToken(
                    new SecureString("AAEAAWVsYXN0aWMvZmxlZXQtc2VydmVyL3Rva2VuMTpzdXBlcnNlY3JldA".toCharArray())
                ),
                equalTo(
                    new ServiceAccountToken(
                        new ServiceAccountId("elastic", "fleet-server"),
                        "token1",
                        new SecureString("supersecret".toCharArray())