Use Jenkinsfile from archetype (#238) (#211)

Use the Jenkinsfile from the plugin archetype in order to reduce
differences throughout the Jenkins organization.

The Jenkinsfile from the plugin archetype is extended to run tests in
parallel in order to reduce the time and cost of tests.

jenkinsci/archetypes#650 describes the
alternatives for Jenkinsfile configurations.

Jenkinsfile

@@ -1,17 +1,11 @@
-// Specify configurations explicitly to test against newer LTS.
-// See also https://github.com/jenkins-infra/pipeline-library/pull/145
-
+/*
+ See the documentation for more options:
+ https://github.com/jenkins-infra/pipeline-library/
+*/
 buildPlugin(
-  // Run a JVM per core in tests
-  forkCount: '1C',
-  // Container agents start faster and are easier to administer
-  useContainerAgent: true,
-  // Show failures on all configurations
-  failFast: false,
-  // Test Java 11, 17, and 21
+  forkCount: '1C', // Run a JVM per core in tests
+  useContainerAgent: true, // Set to `false` if you need to use Docker for containerized tests
   configurations: [
-    [platform: 'linux',   jdk: '17'], // Linux first for coverage report on ci.jenkins.io
-    [platform: 'linux',   jdk: '21', jenkins: '2.414'],
-    [platform: 'windows', jdk: '11'],
-  ]
-)
+    [platform: 'linux', jdk: 21],
+    [platform: 'windows', jdk: 17],
+])