[ML] Adjust BWC versions after backporting reset API (#74107)

Relates #73908

Author: dimitris-athanasiou

build.gradle

@@ -170,9 +170,9 @@ tasks.register("verifyVersions") {
  * after the backport of the backcompat code is complete.
  */
 
-boolean bwc_tests_enabled = false
+boolean bwc_tests_enabled = true
 // place a PR link here when committing bwc changes:
-String bwc_tests_disabled_issue = "https://github.com/elastic/elasticsearch/pull/74093"
+String bwc_tests_disabled_issue = ""
 /*
  * FIPS 140-2 behavior was fixed in 7.11.0. Before that there is no way to run elasticsearch in a
  * JVM that is properly configured to be in fips mode with BCFIPS. For now we need to disable

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/job/config/Job.java

@@ -245,11 +245,7 @@ public Job(StreamInput in) throws IOException {
         resultsIndexName = in.readString();
         deleting = in.readBoolean();
         allowLazyOpen = in.readBoolean();
-        if (in.getVersion().onOrAfter(Version.V_8_0_0)) {
-            blocked = new Blocked(in);
-        } else {
-            blocked = deleting ? new Blocked(Blocked.Reason.DELETE, null) : Blocked.none();
-        }
+        blocked = new Blocked(in);
     }
 
     /**
@@ -526,9 +522,7 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeString(resultsIndexName);
         out.writeBoolean(deleting);
         out.writeBoolean(allowLazyOpen);
-        if (out.getVersion().onOrAfter(Version.V_8_0_0)) {
-            blocked.writeTo(out);
-        }
+        blocked.writeTo(out);
     }
 
     @Override
@@ -972,9 +966,7 @@ public void writeTo(StreamOutput out) throws IOException {
             out.writeOptionalString(resultsIndexName);
             out.writeBoolean(deleting);
             out.writeBoolean(allowLazyOpen);
-            if (out.getVersion().onOrAfter(Version.V_8_0_0)) {
-                blocked.writeTo(out);
-            }
+            blocked.writeTo(out);
         }
 
         public boolean equals(Object o) {

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/job/config/JobUpdate.java

@@ -159,11 +159,7 @@ public JobUpdate(StreamInput in) throws IOException {
             modelSnapshotMinVersion = null;
         }
         allowLazyOpen = in.readOptionalBoolean();
-        if (in.getVersion().onOrAfter(Version.V_8_0_0)) {
-            blocked = in.readOptionalWriteable(Blocked::new);
-        } else {
-            blocked = null;
-        }
+        blocked = in.readOptionalWriteable(Blocked::new);
     }
 
     @Override
@@ -204,9 +200,7 @@ public void writeTo(StreamOutput out) throws IOException {
             out.writeBoolean(false);
         }
         out.writeOptionalBoolean(allowLazyOpen);
-        if (out.getVersion().onOrAfter(Version.V_8_0_0)) {
-            out.writeOptionalWriteable(blocked);
-        }
+        out.writeOptionalWriteable(blocked);
     }
 
     public String getJobId() {