feat(report): update gitlab template to populate operating_system value (#7735)

integration/client_server_test.go

@@ -323,6 +323,17 @@ func TestClientServerWithFormat(t *testing.T) {
 			},
 			golden: "testdata/alpine-310.gitlab.golden",
 		},
+		{
+			name: "scan package-lock.json with gitlab template (Unknown os and image)",
+			args: csArgs{
+				Command:         "fs",
+				Format:          "template",
+				TemplatePath:    "@../contrib/gitlab.tpl",
+				Target:          "testdata/fixtures/repo/npm/",
+				ListAllPackages: true,
+			},
+			golden: "testdata/npm.gitlab.golden",
+		},
 		{
 			name: "alpine 3.10 with gitlab-codequality template",
 			args: csArgs{