Only run tests once

Tests are being run twice in CI. Once with code coverage being
report and once without. Tests only need to be run once.

When Helm previously had testing in CircleCI it was the code
coverage tests so that was retained here.

Signed-off-by: Matt Farina <matt.farina@suse.com>

.github/workflows/build-test.yml

@@ -33,4 +33,4 @@ jobs:
       - name: Run unit tests
         run: make test-coverage
       - name: Test build
-        run: make test build
+        run: make build