add an experimental workflow to test release triggers

.github/workflows/test_release.yml

@@ -0,0 +1,13 @@
+# Test release to experiment with release events triggering workflows
+name: "Test Release"
+on: 
+    release:
+      types: [created]
+jobs:
+    test-release-ubuntu:
+        runs-on: ubuntu-20.04
+        steps:
+            - name: Download OpenTelemetry-Matlab source
+              uses: actions/checkout@v3
+              with: 
+                path: opentelemetry-matlab