Update main branch to Data Prepper 2.13. (#5828)

Signed-off-by: David Venable <dlv@amazon.com>

Author: dlvenable

data-prepper-api/src/main/java/org/opensearch/dataprepper/model/configuration/DataPrepperVersion.java

@@ -6,7 +6,7 @@
 import java.util.regex.Pattern;
 
 public class DataPrepperVersion {
-    private static final String CURRENT_VERSION = "2.12";
+    private static final String CURRENT_VERSION = "2.13";
 
     private static final String FULL_FORMAT = "%d.%d";
     private static final String SHORTHAND_FORMAT = "%d";

gradle.properties

@@ -5,5 +5,5 @@
 
 # ATTENTION: If you are changing the version, please change the DataPrepperVersion whenever the major or minor version changes.
 # See: https://github.com/opensearch-project/data-prepper/blob/main/data-prepper-api/src/main/java/org/opensearch/dataprepper/model/configuration/DataPrepperVersion.java#L9
-version=2.12.0-SNAPSHOT
+version=2.13.0-SNAPSHOT
 org.gradle.jvmargs=-Xmx2048M