Only scan ./tests directory for tests

This fixes the Permission denied errors on python 3.7 builders.

Author: mateusz834

.github/workflows/test.yml

@@ -43,7 +43,7 @@ jobs:
         run: pip install tox
 
       - name: Test Execution
-        run: tox -e py
+        run: tox -e py -- ./tests
   fossa-scan:
     uses: splunk/oss-scanning-public/.github/workflows/oss-scan.yml@main
     secrets: inherit