PMM-7 add alerting tests to matrix (#2981)

* PMM-7 add alerting tests to matrix

* PMM-7 tweaks and add trigger from autobuild

Author: yurkovychv

pmm/v3/pmm3-ui-tests-matrix.groovy

@@ -63,12 +63,19 @@ pipeline {
     options {
         skipDefaultCheckout()
     }
-//     triggers {
-//         upstream upstreamProjects: 'pmm3-server-autobuild', threshold: hudson.model.Result.SUCCESS
-//     }
+    triggers {
+        upstream upstreamProjects: 'pmm3-server-autobuild', threshold: hudson.model.Result.SUCCESS
+    }
     stages{
-        stage('UI tests Upgrade Matrix') {
+        stage('UI tests Matrix') {
             parallel {
+                stage('@ia'){
+                    steps {
+                        script {
+                            runUITestsJob(GIT_BRANCH, GIT_COMMIT_HASH, DOCKER_VERSION, CLIENT_VERSION, '@ia', MYSQL_IMAGE, POSTGRES_IMAGE, MONGO_IMAGE, PROXYSQL_IMAGE, PMM_QA_GIT_BRANCH, '');
+                        }
+                    }
+                }
                 stage('@instances'){
                     steps {
                         script {