Add new index setting for ignored version

Author: lukewhiting

server/src/main/java/org/elasticsearch/cluster/metadata/IndexMetadata.java

@@ -1346,6 +1346,15 @@ public String toString() {
         Property.InternalIndex
     );
 
+    public static final String INDEX_IGNORE_DEPRECATION_WARNING_FOR_VERSION_KEY = "index.ignore_deprecation_warning_for_version";
+    public static final Setting<IndexVersion> IGNORE_INDEX_DEPRECATION_WARNING_FOR_VERSION_SETTING = Setting.versionIdSetting(
+        INDEX_IGNORE_DEPRECATION_WARNING_FOR_VERSION_KEY,
+        IndexVersions.ZERO,
+        IndexVersion::fromId,
+        Property.IndexScope,
+        Property.Dynamic
+    );
+
     // LIFECYCLE_NAME is here an as optimization, see LifecycleSettings.LIFECYCLE_NAME and
     // LifecycleSettings.LIFECYCLE_NAME_SETTING for the 'real' version
     public static final String LIFECYCLE_NAME = "index.lifecycle.name";

server/src/main/java/org/elasticsearch/common/settings/IndexScopedSettings.java

@@ -189,6 +189,7 @@ public final class IndexScopedSettings extends AbstractScopedSettings {
         IgnoredSourceFieldMapper.SKIP_IGNORED_SOURCE_READ_SETTING,
         SourceFieldMapper.INDEX_MAPPER_SOURCE_MODE_SETTING,
         IndexSettings.RECOVERY_USE_SYNTHETIC_SOURCE_SETTING,
+        IndexMetadata.IGNORE_INDEX_DEPRECATION_WARNING_FOR_VERSION_SETTING,
 
         // validate that built-in similarities don't get redefined
         Setting.groupSetting("index.similarity.", (s) -> {