Change version in PluginInfo to V_2_19_0 after backport to 2.x merged (#16947)

Signed-off-by: Craig Perkins <cwperx@amazon.com>

Author: cwperks

server/src/main/java/org/opensearch/plugins/PluginInfo.java

@@ -215,7 +215,7 @@ public PluginInfo(final StreamInput in) throws IOException {
         this.customFolderName = in.readString();
         this.extendedPlugins = in.readStringList();
         this.hasNativeController = in.readBoolean();
-        if (in.getVersion().onOrAfter(Version.V_3_0_0)) {
+        if (in.getVersion().onOrAfter(Version.V_2_19_0)) {
             this.optionalExtendedPlugins = in.readStringList();
         } else {
             this.optionalExtendedPlugins = new ArrayList<>();
@@ -250,7 +250,7 @@ This works for currently supported range notations (=,~)
         }
         out.writeStringCollection(extendedPlugins);
         out.writeBoolean(hasNativeController);
-        if (out.getVersion().onOrAfter(Version.V_3_0_0)) {
+        if (out.getVersion().onOrAfter(Version.V_2_19_0)) {
             out.writeStringCollection(optionalExtendedPlugins);
         }
     }