test/test-framework: remove go.sum and gitignore it (#2835)

Author: estroz

.gitignore

@@ -101,6 +101,7 @@ images/scorecard-proxy/scorecard-proxy
 # Test artifacts
 pkg/ansible/runner/testdata/valid.yaml
 /bin
+test/test-framework/go.sum
 
 # Website
 website/public/