Build: Remove specifying zip distribution in qa tests (elastic/x-pack-elasticsearch#4037)

This is the xpack side of https://github.com/elastic/elasticsearch/pull/28805

Original commit: elastic/x-pack-elasticsearch@48cbe6623f

qa/full-cluster-restart/build.gradle

@@ -141,7 +141,6 @@ subprojects {
     configure(extensions.findByName("${baseName}#oldClusterTestCluster")) {
       dependsOn copyTestNodeKeystore
       plugin xpackProject('plugin').path
-      distribution = 'zip'
       bwcVersion = version
       numBwcNodes = 2
       numNodes = 2
@@ -192,7 +191,6 @@ subprojects {
           "${baseName}#oldClusterTestCluster#node0.stop",
           "${baseName}#oldClusterTestCluster#node1.stop"
       plugin xpackProject('plugin').path
-      distribution = 'zip'
       numNodes = 2
       clusterName = 'full-cluster-restart'
       dataDir = { nodeNum -> oldClusterTest.nodes[nodeNum].dataDir }

qa/ml-basic-multi-node/build.gradle

@@ -13,6 +13,5 @@ integTestCluster {
     setting 'xpack.ml.enabled', 'true'
     setting 'xpack.license.self_generated.type', 'trial'
     numNodes = 3
-    distribution = 'zip'
     plugin xpackProject('plugin').path
 }

qa/ml-disabled/build.gradle

@@ -10,6 +10,5 @@ integTestCluster {
     setting 'xpack.security.enabled', 'false'
     setting 'xpack.ml.enabled', 'false'
     numNodes = 1
-    distribution = 'zip'
     plugin xpackProject('plugin').path
 }

qa/ml-native-tests/build.gradle

@@ -64,7 +64,6 @@ integTestCluster {
 
   keystoreSetting 'bootstrap.password', 'x-pack-test-password'
   keystoreSetting 'xpack.security.transport.ssl.keystore.secure_password', 'keypass'
-  distribution = 'zip' // this is important since we use the reindex module in ML
 
   setupCommand 'setupDummyUser',
           'bin/x-pack/users', 'useradd', 'x_pack_rest_user', '-p', 'x-pack-test-password', '-r', 'superuser'

qa/multi-cluster-search-security/build.gradle

@@ -12,7 +12,6 @@ task remoteClusterTest(type: RestIntegTestTask) {
 }
 
 remoteClusterTestCluster {
-  distribution = 'zip'
   numNodes = 2
   clusterName = 'remote-cluster'
   setting 'search.remote.connect', false
@@ -60,7 +59,6 @@ mixedClusterTestCluster {
             retries: 10)
     return tmpFile.exists()
   }
-  distribution = 'zip'
   setting 'search.remote.my_remote_cluster.seeds', "\"${-> remoteClusterTest.nodes.get(0).transportUri()}\""
   setting 'search.remote.connections_per_cluster', 1
   setting 'search.remote.connect', true

qa/multi-node/build.gradle

@@ -6,7 +6,6 @@ dependencies {
 }
 
 integTestCluster {
-  distribution = 'zip'
   numNodes = 2
   clusterName = 'multi-node'
   plugin xpackProject('plugin').path

qa/rolling-upgrade/build.gradle

@@ -124,7 +124,6 @@ subprojects {
       dependsOn copyTestNodeKeystore
       plugin xpackProject('plugin').path
       setupCommand 'setupTestUser', 'bin/x-pack/users', 'useradd', 'test_user', '-p', 'x-pack-test-password', '-r', 'superuser'
-      distribution = 'zip'
       bwcVersion = version
       numBwcNodes = 2
       numNodes = 2
@@ -171,7 +170,6 @@ subprojects {
       dependsOn oldClusterTestRunner, "${baseName}#oldClusterTestCluster#node1.stop"
       plugin xpackProject('plugin').path
       setupCommand 'setupTestUser', 'bin/x-pack/users', 'useradd', 'test_user', '-p', 'x-pack-test-password', '-r', 'superuser'
-      distribution = 'zip'
       clusterName = 'rolling-upgrade'
       unicastTransportUri = { seedNode, node, ant -> oldClusterTest.nodes.get(0).transportUri() }
       minimumMasterNodes = { 2 }
@@ -211,7 +209,6 @@ subprojects {
       dependsOn(mixedClusterTestRunner, "${baseName}#oldClusterTestCluster#node0.stop")
       plugin xpackProject('plugin').path
       setupCommand 'setupTestUser', 'bin/x-pack/users', 'useradd', 'test_user', '-p', 'x-pack-test-password', '-r', 'superuser'
-      distribution = 'zip'
       clusterName = 'rolling-upgrade'
       unicastTransportUri = { seedNode, node, ant -> mixedClusterTest.nodes.get(0).transportUri() }
       minimumMasterNodes = { 2 }

qa/sql/build.gradle

@@ -103,7 +103,6 @@ subprojects {
     }
 
     integTestCluster {
-      distribution = 'zip'
       plugin xpackProject('plugin').path
       setting 'xpack.monitoring.enabled', 'false'
       setting 'xpack.ml.enabled', 'false'
@@ -118,7 +117,6 @@ subprojects {
     }
 
     task runqa(type: RunTask) {
-      distribution = 'zip'
       plugin xpackProject('plugin').path
       setting 'xpack.monitoring.enabled', 'false'
       setting 'xpack.ml.enabled', 'false'