shared: move OOMPolicy varlink enum to varlink-idl-common

OOMPolicy is used by both io.systemd.Manager (DefaultOOMPolicy) and io.systemd.Unit (ScopeContext.OOMPolicy), so it belongs in the shared common types alongside ManagedOOMMode and EmergencyAction.

src/shared/varlink-idl-common.c

@@ -98,6 +98,12 @@ SD_VARLINK_DEFINE_ENUM_TYPE(
                 SD_VARLINK_DEFINE_ENUM_VALUE(auto),
                 SD_VARLINK_DEFINE_ENUM_VALUE(kill));
 
+SD_VARLINK_DEFINE_ENUM_TYPE(
+                OOMPolicy,
+                SD_VARLINK_DEFINE_ENUM_VALUE(continue),
+                SD_VARLINK_DEFINE_ENUM_VALUE(stop),
+                SD_VARLINK_DEFINE_ENUM_VALUE(kill));
+
 SD_VARLINK_DEFINE_ENUM_TYPE(
                 EmergencyAction,
                 SD_VARLINK_DEFINE_ENUM_VALUE(none),

src/shared/varlink-idl-common.h

@@ -12,4 +12,5 @@ extern const sd_varlink_symbol vl_type_ExecCommand;
 extern const sd_varlink_symbol vl_type_ExecOutputType;
 extern const sd_varlink_symbol vl_type_CGroupPressureWatch;
 extern const sd_varlink_symbol vl_type_ManagedOOMMode;
+extern const sd_varlink_symbol vl_type_OOMPolicy;
 extern const sd_varlink_symbol vl_type_EmergencyAction;

src/shared/varlink-io.systemd.Manager.c

@@ -15,12 +15,6 @@ SD_VARLINK_DEFINE_ENUM_TYPE(
                 SD_VARLINK_DEFINE_ENUM_VALUE(auto),
                 SD_VARLINK_DEFINE_ENUM_VALUE(null));
 
-SD_VARLINK_DEFINE_ENUM_TYPE(
-                OOMPolicy,
-                SD_VARLINK_DEFINE_ENUM_VALUE(continue),
-                SD_VARLINK_DEFINE_ENUM_VALUE(stop),
-                SD_VARLINK_DEFINE_ENUM_VALUE(kill));
-
 static SD_VARLINK_DEFINE_STRUCT_TYPE(
                 LogLevelStruct,
                 SD_VARLINK_FIELD_COMMENT("'console' target log level"),

src/shared/varlink-io.systemd.Manager.h

@@ -6,4 +6,3 @@
 extern const sd_varlink_interface vl_interface_io_systemd_Manager;
 
 extern const sd_varlink_symbol vl_type_LogTarget;
-extern const sd_varlink_symbol vl_type_OOMPolicy;