Reenable BwC Tests after #58414 (#58420)

Now that #58414 has been merged, reenabling BwC tests

Author: original-brownbear

build.gradle

@@ -174,8 +174,8 @@ tasks.register("verifyVersions") {
  * after the backport of the backcompat code is complete.
  */
 
-boolean bwc_tests_enabled = false
-final String bwc_tests_disabled_issue = "https://github.com/elastic/elasticsearch/pull/58414" /* place a PR link here when committing bwc changes */
+boolean bwc_tests_enabled = true
+final String bwc_tests_disabled_issue = "" /* place a PR link here when committing bwc changes */
 if (bwc_tests_enabled == false) {
   if (bwc_tests_disabled_issue.isEmpty()) {
     throw new GradleException("bwc_tests_disabled_issue must be set when bwc_tests_enabled == false")

server/src/main/java/org/elasticsearch/action/bulk/BulkShardRequest.java

@@ -35,7 +35,7 @@
 
 public class BulkShardRequest extends ReplicatedWriteRequest<BulkShardRequest> {
 
-    public static final Version COMPACT_SHARD_ID_VERSION = Version.V_8_0_0;
+    public static final Version COMPACT_SHARD_ID_VERSION = Version.V_7_9_0;
 
     private BulkItemRequest[] items;