scripts/test-infra: provide PR info to codecov

Provide the commit SHA repo slug, PR number, prow build id and base
branch  to the codecov tool so that it is able to do its job.

scripts/test-infra/verify.sh

@@ -29,7 +29,12 @@ echo "Running unit tests"
 make test
 
 # Upload coverage report
-./codecov -t ${CODECOV_TOKEN}
+./codecov -t ${CODECOV_TOKEN} \
+          -C ${PULL_PULL_SHA} \
+          -r ${REPO_OWNER}/${REPO_NAME} \
+          -P ${PULL_NUMBER} \
+          -b ${BUILD_ID} \
+          -B ${PULL_BASE_REF}
 
 # Check that repo is clean
 if ! git diff --quiet; then