Update 2.x to 2.20.0

Signed-off-by: Andriy Redko <[email protected]>

Author: reta

buildSrc/version.properties

@@ -1 +1 @@
-opensearch        = 2.19.0
+opensearch        = 2.20.0

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-opensearch        = "2.19.0"
+opensearch        = "2.20.0"
 lucene            = "9.12.1"
 
 bundled_jdk_vendor = "adoptium"

libs/core/src/main/java/org/opensearch/Version.java

@@ -145,7 +145,8 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_2_18_0 = new Version(2180099, org.apache.lucene.util.Version.LUCENE_9_12_0);
     public static final Version V_2_18_1 = new Version(2180199, org.apache.lucene.util.Version.LUCENE_9_12_1);
     public static final Version V_2_19_0 = new Version(2190099, org.apache.lucene.util.Version.LUCENE_9_12_1);
-    public static final Version CURRENT = V_2_19_0;
+    public static final Version V_2_20_0 = new Version(2200099, org.apache.lucene.util.Version.LUCENE_9_12_1);
+    public static final Version CURRENT = V_2_20_0;
 
     public static Version fromId(int id) {
         final Version known = LegacyESVersion.idToVersion.get(id);