Disable Bwc Tests (#39551)

* Disable Bwc Tests
* For #39550

build.gradle

@@ -159,8 +159,8 @@ task verifyVersions {
  * the enabled state of every bwc task. It should be set back to true
  * after the backport of the backcompat code is complete.
  */
-boolean bwc_tests_enabled = true
-final String bwc_tests_disabled_issue = "" /* place a PR link here when committing bwc changes */
+boolean bwc_tests_enabled = false
+final String bwc_tests_disabled_issue = "https://github.com/elastic/elasticsearch/pull/39550" /* 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/cluster/SnapshotsInProgress.java

@@ -446,7 +446,7 @@ public SnapshotsInProgress(StreamInput in) throws IOException {
             }
             long repositoryStateId = in.readLong();
             final String failure;
-            if (in.getVersion().onOrAfter(Version.V_7_0_0)) {
+            if (in.getVersion().onOrAfter(Version.V_6_7_0)) {
                 failure = in.readOptionalString();
             } else {
                 failure = null;
@@ -488,7 +488,7 @@ public void writeTo(StreamOutput out) throws IOException {
                 }
             }
             out.writeLong(entry.repositoryStateId);
-            if (out.getVersion().onOrAfter(Version.V_7_0_0)) {
+            if (out.getVersion().onOrAfter(Version.V_6_7_0)) {
                 out.writeOptionalString(entry.failure);
             }
         }