### CI Link

https://gradle-enterprise.elastic.co/s/ozb6lycxc43es/console-log?task=:security-authorization-engine:compileJava

### Repro line

cd plugin/examples; ./gradlew build --include-build ../..

### Does it reproduce?

Yes

### Applicable branches

master

### Failure history

_No response_

### Failure excerpt

After merging https://github.com/elastic/elasticsearch/pull/86246 example builds started failing with compilation errors 

```
> Task :security-authorization-engine:compileJava FAILED
/Users/rene/dev/elasticsearch-master/plugins/examples/security-authorization-engine/src/main/java/org/elasticsearch/example/CustomAuthorizationEngine.java:50: error: cannot find symbol
        if (authentication.getUser().isRunAs()) {
                                    ^
  symbol:   method isRunAs()
  location: class User
/Users/rene/dev/elasticsearch-master/plugins/examples/security-authorization-engine/src/main/java/org/elasticsearch/example/CustomAuthorizationEngine.java:52: error: cannot find symbol
                new CustomAuthorizationInfo(authentication.getUser().authenticatedUser().roles(), null);
                                                                    ^
  symbol:   method authenticatedUser()
  location: class User
/Users/rene/dev/elasticsearch-master/plugins/examples/security-authorization-engine/src/main/java/org/elasticsearch/example/CustomAuthorizationEngine.java:61: error: cannot find symbol
        if (isSuperuser(requestInfo.getAuthentication().getUser().authenticatedUser())) {
                                                                 ^
  symbol:   method authenticatedUser()
  location: class User
Note: /Users/rene/dev/elasticsearch-master/plugins/examples/security-authorization-engine/src/main/java/org/elasticsearch/example/CustomAuthorizationEngine.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
3 errors

```
plugins/examples/security-authorization-engine/src/main/java/org/elasticsearch/example/CustomAuthorizationEngine.java
private final String[] roles;
        private final CustomAuthorizationInfo authenticatedAuthzInfo;
        CustomAuthorizationInfo(String[] roles, CustomAuthorizationInfo authenticatedAuthzInfo) {
            this.roles = roles;
            this.authenticatedAuthzInfo = authenticatedAuthzInfo;
        }
        @Override
        public Map<String, Object> asMap() {
            return Collections.singletonMap("roles", roles);
        }
        @Override
        public CustomAuthorizationInfo getAuthenticatedUserAuthorizationInfo() {
            return authenticatedAuthzInfo;
        }
    }
    private boolean isSuperuser(User user) {
        return Arrays.asList(user.roles()).contains("custom_superuser");
    }
}