Add bwc version 2.19.3

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: opensearch-ci-bot

.ci/bwcVersions

@@ -104,3 +104,4 @@ BWC_VERSION:
   - "2.19.0"
   - "2.19.1"
   - "2.19.2"
+  - "2.19.3"

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

@@ -147,6 +147,7 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_2_19_0 = new Version(2190099, org.apache.lucene.util.Version.LUCENE_9_12_1);
     public static final Version V_2_19_1 = new Version(2190199, org.apache.lucene.util.Version.LUCENE_9_12_1);
     public static final Version V_2_19_2 = new Version(2190299, org.apache.lucene.util.Version.LUCENE_9_12_1);
+    public static final Version V_2_19_3 = new Version(20190399, org.apache.lucene.util.Version.LUCENE_9_12_1);
     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;