Remove support for logging via GELF

Logging via GELF was deprecated in Keycloak 24 and was finally removed
in Keycloak 26.

Author: nblock

types/configs.pp

@@ -63,22 +63,13 @@
     Optional['vault-file'] => Stdlib::Absolutepath,
     Optional['vault-pass'] => Variant[String[1], Sensitive],
     Optional['vault-type'] => Enum['PKCS12'],
-    Optional['log'] => Array[Enum['console','file','gelf','syslog']],
+    Optional['log'] => Array[Enum['console','file','syslog']],
     Optional['log-console-color'] => Boolean,
     Optional['log-console-format'] => String[1],
     Optional['log-console-output'] => Enum['default','json'],
     Optional['log-file'] => String[1],
     Optional['log-file-format'] => String[1],
     Optional['log-file-output'] => Enum['default','json'],
-    Optional['log-gelf-facility'] => String[1],
-    Optional['log-gelf-host'] => Stdlib::Host,
-    Optional['log-gelf-include-location'] => Boolean,
-    Optional['log-gelf-include-message-parameters'] => Boolean,
-    Optional['log-gelf-include-stack-trace'] => Boolean,
-    Optional['log-gelf-level'] => String[1],
-    Optional['log-gelf-max-message-size'] => Integer,
-    Optional['log-gelf-port'] => Stdlib::Port,
-    Optional['log-gelf-timestamp-format'] => String[1],
     Optional['log-syslog-protocol'] => Enum['tcp','udp','ssl-tcp'],
     Optional['log-syslog-endpoint'] => String[1],
     Optional['log-syslog-format'] => String[1],