[Build] Enable automated version increments for eclipse.platform.releng

Set up for this repository the workflow for automated version increments
in pull-requests added via
- eclipse-platform#2352

But only for the projects in the 'eclipse.platform.releng' in order to
avoid building the entire SDK just to check for version increments.
Missing version increments in sub-modules cannot be handled in this
repository anyway.

Author: HannesWell

.github/workflows/pr-checks.yml

@@ -0,0 +1,22 @@
+# Fast running checks for pull-requests
+
+name: Pull-Request Checks
+concurrency: 
+    group: ${{ github.workflow }}-${{ github.ref }}
+    cancel-in-progress: true
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  check-versions:
+    # Run this check only for PRs from forks and not for changes from bots created on branches in this repository
+    if: github.event.pull_request.head.repo.full_name != github.repository
+    uses: ./.github/workflows/checkVersions.yml
+    with:
+      botName: Eclipse Platform Bot
+      botMail: [email protected]
+      # Only check 'eclipse.platform.releng' projects
+      working-directory: 'eclipse.platform.releng'
+      extra-maven-args: '-Pbuild-individual-bundles'

.github/workflows/version-increments.yml

@@ -0,0 +1,14 @@
+name: Publish Version Check Results
+
+on:
+  workflow_run:
+    workflows: [ 'Pull-Request Checks' ]
+    types: [ completed ]
+
+jobs:
+  publish-version-check-results:
+    uses: ./.github/workflows/publishVersionCheckResults.yml
+    with:
+      botGithubId: eclipse-platform-bot
+    secrets:
+      githubBotPAT: ${{ secrets.PLATFORM_BOT_PAT }}