Update versions after wait_for_refresh backport (#79199)

This commit updates the version constants and reenables BWC tests.

build.gradle

@@ -132,9 +132,9 @@ 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/79199"
+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

server/src/main/java/org/elasticsearch/action/search/SearchRequest.java

@@ -241,8 +241,7 @@ public class SearchRequest extends ActionRequest implements IndicesRequest.Repla
         } else {
             minCompatibleShardNode = null;
         }
-        // TODO: Change after backport
-        if (in.getVersion().onOrAfter(Version.V_8_0_0)) {
+        if (in.getVersion().onOrAfter(Version.V_7_16_0)) {
             waitForCheckpoints = in.readMap(StreamInput::readString, StreamInput::readLongArray);
             waitForCheckpointsTimeout = in.readTimeValue();
         }
@@ -279,9 +278,8 @@ public class SearchRequest extends ActionRequest implements IndicesRequest.Repla
                 Version.writeVersion(minCompatibleShardNode, out);
             }
         }
-        // TODO: Change after backport
-        Version waitForCheckpointsVersion = Version.V_8_0_0;
-        if (out.getVersion().onOrAfter(Version.V_8_0_0)) {
+        Version waitForCheckpointsVersion = Version.V_7_16_0;
+        if (out.getVersion().onOrAfter(waitForCheckpointsVersion)) {
             out.writeMap(waitForCheckpoints, StreamOutput::writeString, StreamOutput::writeLongArray);
             out.writeTimeValue(waitForCheckpointsTimeout);
         } else if (waitForCheckpoints.isEmpty() == false) {

server/src/main/java/org/elasticsearch/search/internal/ShardSearchRequest.java

@@ -247,8 +247,7 @@ public class ShardSearchRequest extends TransportRequest implements IndicesReque
         }
         assert keepAlive == null || readerId != null : "readerId: " + readerId + " keepAlive: " + keepAlive;
         channelVersion = Version.min(Version.readVersion(in), in.getVersion());
-        // TODO: Update after backport
-        if (in.getVersion().onOrAfter(Version.V_8_0_0)) {
+        if (in.getVersion().onOrAfter(Version.V_7_16_0)) {
             waitForCheckpoint = in.readLong();
             waitForCheckpointsTimeout = in.readTimeValue();
         } else {
@@ -322,8 +321,7 @@ public class ShardSearchRequest extends TransportRequest implements IndicesReque
             out.writeOptionalTimeValue(keepAlive);
         }
         Version.writeVersion(channelVersion, out);
-        // TODO: Update after backport
-        Version waitForCheckpointsVersion = Version.V_8_0_0;
+        Version waitForCheckpointsVersion = Version.V_7_16_0;
         if (out.getVersion().onOrAfter(waitForCheckpointsVersion)) {
             out.writeLong(waitForCheckpoint);
             out.writeTimeValue(waitForCheckpointsTimeout);