Make all pre-releases dry-runs (drafts deleted afterwards) by default

Doing GitHub Release for every single build is very wasteful on GH resources and I am ending this practice. Technically we could tag every release when built and just check a tag exists, but this is also unnecessary - instead we just ensure we run all the tests every time we do a manually triggered release.

Author: chadlwilson

.github/workflows/release.yml

@@ -6,6 +6,12 @@ name: Test and Build
 on:
   push:
     branches: [ master ]
+  workflow_dispatch:
+    inputs:
+      prerelease:
+        description: 'The release should be an experimental release'
+        default: 'NO'
+        required: true
 
 jobs:
   test:
@@ -35,6 +41,7 @@ jobs:
     env:
       GITHUB_USER:  "gocd-contrib"
       GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+      PRERELEASE:   "${{ github.event.inputs.prerelease }}"
     steps:
       - name: Harden the runner (Audit all outbound calls)
         uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1

.github/workflows/test_and_build.yml

@@ -37,6 +37,7 @@ gocdPlugin {
     pluginProject = project
 
     prerelease = !"No".equalsIgnoreCase(System.getenv('PRERELEASE'))
+    prereleaseDryrun = !"Yes".equalsIgnoreCase(System.getenv('PRERELEASE'))
     assetsToRelease = [project.tasks.jar]
 }