Print out agent debugging links during CI (#52812)

vars/agentInfo.groovy

@@ -0,0 +1,42 @@
+def print() {
+  try {
+    def startTime = sh(script: "date -d '-3 minutes' -Iseconds | sed s/+/%2B/", returnStdout: true).trim()
+    def endTime = sh(script: "date -d '+1 hour 30 minutes' -Iseconds | sed s/+/%2B/", returnStdout: true).trim()
+
+    def resourcesUrl =
+      (
+        "https://infra-stats.elastic.co/app/kibana#/visualize/edit/8bd92360-1b92-11ea-b719-aba04518cc34" +
+        "?_g=(time:(from:'${startTime}',to:'${endTime}'))" +
+        "&_a=(query:'host.name:${env.NODE_NAME}')"
+      )
+      .replaceAll("'", '%27') // Need to escape ' because of the shell echo below, but can't really replace "'" with "\'" because of groovy sandbox
+      .replaceAll(/\)$/, '%29') // This is just here because the URL parsing in the Jenkins console doesn't work right
+
+    def logsStartTime = sh(script: "date -d '-3 minutes' +%s", returnStdout: true).trim()
+    def logsUrl =
+      (
+        "https://infra-stats.elastic.co/app/infra#/logs" +
+        "?_g=()&flyoutOptions=(flyoutId:!n,flyoutVisibility:hidden,surroundingLogsId:!n)" +
+        "&logFilter=(expression:'host.name:${env.NODE_NAME}',kind:kuery)" +
+        "&logPosition=(position:(time:${logsStartTime}000),streamLive:!f)"
+      )
+      .replaceAll("'", '%27')
+      .replaceAll('\\)', '%29')
+
+    sh script: """
+      set +x
+      echo 'Resource Graph:'
+      echo '${resourcesUrl}'
+      echo ''
+      echo 'Agent Logs:'
+      echo '${logsUrl}'
+      echo ''
+      echo 'SSH Command:'
+      echo "ssh -F ssh_config \$(hostname --ip-address)"
+    """, label: "Worker/Agent/Node debug links"
+  } catch(ex) {
+    print ex.toString()
+  }
+}
+
+return this

vars/kibanaPipeline.groovy

@@ -116,6 +116,8 @@ def legacyJobRunner(name) {
 
 def jobRunner(label, useRamDisk, closure) {
   node(label) {
+    agentInfo.print()
+
     if (useRamDisk) {
       // Move to a temporary workspace, so that we can symlink the real workspace into /dev/shm
       def originalWorkspace = env.WORKSPACE