Move Jenkins "input" steps outside of nodes/agents

So that we don't keep a node reserved while we're waiting for input.

See best practice 6 in https://www.cloudbees.com/blog/top-10-best-practices-jenkins-pipeline-plugin

Author: Hibernate-CI

ci/jpa-3.1-tck.Jenkinsfile

@@ -14,9 +14,7 @@ if ( !env.CHANGE_ID ) {
 }
 
 pipeline {
-    agent {
-        label 'LongDuration'
-    }
+    agent none
     tools {
         jdk 'OpenJDK 11 Latest'
     }
@@ -32,7 +30,15 @@ pipeline {
         booleanParam(name: 'NO_SLEEP', defaultValue: true, description: 'Whether the NO_SLEEP patch should be applied to speed up the TCK execution')
 	}
     stages {
+        stage('Checks') {
+        	steps {
+                requireApprovalForPullRequest 'hibernate'
+            }
+        }
         stage('Build') {
+            agent {
+                label 'LongDuration'
+            }
         	steps {
                 requireApprovalForPullRequest 'hibernate'
 				script {

ci/quarkus.Jenkinsfile

@@ -14,9 +14,7 @@ if ( !env.CHANGE_ID ) {
 }
 
 pipeline {
-    agent {
-        label 'LongDuration'
-    }
+    agent none
     tools {
         jdk 'OpenJDK 17 Latest'
     }
@@ -26,7 +24,15 @@ pipeline {
         skipDefaultCheckout()
     }
     stages {
+        stage('Checks') {
+        	steps {
+                requireApprovalForPullRequest 'hibernate'
+            }
+        }
         stage('Build') {
+            agent {
+                label 'LongDuration'
+            }
         	steps {
                 requireApprovalForPullRequest 'hibernate'
 				script {