CI: add a quick test, set enterprise2 when the enterprise2 flag is added (#59967)

* add a quick test, set enterprise2 when the enterprise2 flag is added

Co-authored-by: Dave Henderson <dave.henderson@grafana.com>

pkg/build/packaging/grafana_test.go

@@ -0,0 +1,22 @@
+package packaging_test
+
+import (
+	"testing"
+
+	"github.com/grafana/grafana/pkg/build/config"
+	"github.com/grafana/grafana/pkg/build/packaging"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPackageRegexp(t *testing.T) {
+	t.Run("It should match enterprise2 packages", func(t *testing.T) {
+		rgx := packaging.PackageRegexp(config.EditionEnterprise2)
+		matches := []string{
+			"grafana-enterprise2-1.2.3-4567pre.linux-amd64.tar.gz",
+			"grafana-enterprise2-1.2.3-4567pre.linux-amd64.tar.gz.sha256",
+		}
+		for _, v := range matches {
+			assert.Truef(t, rgx.MatchString(v), "'%s' should match regex '%s'", v, rgx.String())
+		}
+	})
+}