add unit test workflow step

Author: yiyuan-he

.github/workflows/release-udp-exporter.yml

@@ -25,13 +25,16 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install hatch pytest
+          pip install hatch pytest flask
 
       - name: Build package
         working-directory: exporters/aws-otel-otlp-udp-exporter
         run: hatch build
 
       # TODO: Add unit tests step
+      - name: Ensure Unit Tests are passing
+        run: |
+          pytest exporters/aws-otel-otlp-udp-exporter/tests/test_exporter.py
 
       - name: Download and run X-Ray Daemon
         run: |
@@ -45,10 +48,6 @@ jobs:
         run: |
           pip install ./exporters/aws-otel-otlp-udp-exporter/dist/*.whl
 
-      - name: Install Flask
-        run: |
-          pip install flask
-
       - name: Run Sample App in Background
         working-directory: sample-applications/integ-test-app
         run: |