Updates and fixes for unit test workflows

Tag check doesn't run on Go repos, so the Go install has been removed.
Other changes are mostly updates, self-explanatory bug fixes, and some
additional comments.

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I57e33156ffb234e1953e0d307305893593238284
diff --git a/.github/workflows/verify-unit-tests.yaml b/.github/workflows/verify-unit-tests.yaml
index 7c82ae3..1bab794 100644
--- a/.github/workflows/verify-unit-tests.yaml
+++ b/.github/workflows/verify-unit-tests.yaml
@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: 2026 The Linux Foundation
 name: Gerrit Verify - Unit Tests
+# Requires a go.mod file to be present in the repo
 
 # yamllint disable-line rule:truthy
 on: