Add stub workflow file to iterate on (#17993) (#18043)

* Add stub workflow file to iterate on

This commit adds a stub GH action to be used for iterating on
https://github.com/elastic/logstash/pull/17945/files this was based on a
suggestion from the infra team for developing these workflows. Notably this has
a pull_request trigger which will allow us to run the workflow from a PR raised
from a test branch in the elastic/logstash repo.

* Update .github/workflows/bump-java-version.yml



* Update .github/workflows/bump-java-version.yml

---------


(cherry picked from commit ef41e83)

Co-authored-by: Cas Donoghue <[email protected]>
Co-authored-by: Rye Biesemeyer <[email protected]>

Author: 3 people

.github/workflows/bump-java-version.yml

@@ -0,0 +1,19 @@
+name: Stub GH action for devoping new workflows [STUB]
+on:
+  workflow_dispatch:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  stub_job_name:
+    name: Stub Job
+    runs-on: ubuntu-latest
+    steps:
+      - name: Stub step
+        run: |
+          echo "Stub to iterate via PR"
+