Skip rolling upgrade bwc on major version change

Signed-off-by: Daniel Widdis <widdis@gmail.com>

build.gradle

@@ -8,7 +8,6 @@ import java.nio.file.Paths
 buildscript {
     ext {
         opensearch_version = System.getProperty("opensearch.version", "3.0.0-SNAPSHOT")
-        bwcVersionShort = "2.12.0"
         buildVersionQualifier = System.getProperty("build.version_qualifier", "")
         isSnapshot = "true" == System.getProperty("build.snapshot", "true")
         version_tokens = opensearch_version.tokenize('-')
@@ -207,6 +206,12 @@ jacocoTestReport {
 }
 tasks.named("check").configure { dependsOn(jacocoTestReport) }
 
+tasks.named("yamlRestTest").configure {
+    filter {
+        exclude "**"
+        includeTestsMatching "**/*YamlTestSuiteIT.*"
+    }
+}
 
 // Set up integration tests
 task integTest(type: RestIntegTestTask) {
@@ -505,6 +510,7 @@ List<Provider<RegularFile>> plugins = [
 // Creates 2 test clusters with 3 nodes of the old version.
 2.times {i ->
     task "${baseName}#oldVersionClusterTask$i"(type: StandaloneRestIntegTestTask) {
+        onlyIf { isSameMajorVersion || (i == 1) }
         useCluster testClusters."${baseName}$i"
         filter {
             includeTestsMatching "org.opensearch.flowframework.bwc.*IT"
@@ -521,6 +527,7 @@ List<Provider<RegularFile>> plugins = [
 // This results in a mixed cluster with 2 nodes on the old version and 1 upgraded node.
 // This is also used as a one third upgraded cluster for a rolling upgrade.
 task "${baseName}#mixedClusterTask"(type: StandaloneRestIntegTestTask) {
+    onlyIf { isSameMajorVersion }
     useCluster testClusters."${baseName}0"
     dependsOn "${baseName}#oldVersionClusterTask0"
     doFirst {
@@ -540,6 +547,7 @@ task "${baseName}#mixedClusterTask"(type: StandaloneRestIntegTestTask) {
 // This results in a mixed cluster with 1 node on the old version and 2 upgraded nodes.
 // This is used for rolling upgrade.
 task "${baseName}#twoThirdsUpgradedClusterTask"(type: StandaloneRestIntegTestTask) {
+    onlyIf { isSameMajorVersion }
     dependsOn "${baseName}#mixedClusterTask"
     useCluster testClusters."${baseName}0"
     doFirst {
@@ -559,6 +567,7 @@ task "${baseName}#twoThirdsUpgradedClusterTask"(type: StandaloneRestIntegTestTas
 // This results in a fully upgraded cluster.
 // This is used for rolling upgrade.
 task "${baseName}#rollingUpgradeClusterTask"(type: StandaloneRestIntegTestTask) {
+    onlyIf { isSameMajorVersion }
     dependsOn "${baseName}#twoThirdsUpgradedClusterTask"
     useCluster testClusters."${baseName}0"
     doFirst {
@@ -614,6 +623,11 @@ allprojects {
             }
         }
     }
+    // Needed for Gradle 9.0
+    tasks.withType(StandaloneRestIntegTestTask).configureEach {
+        testClassesDirs = sourceSets.test.output.classesDirs
+        classpath = sourceSets.test.runtimeClasspath
+    }
 }
 
 // Automatically sets up the integration test cluster locally