Add test for linkerd-config data without Global

Co-authored-by: Itai Schwartz <yitai27@gmail.com>

pkg/healthcheck/healthcheck_test.go

@@ -1792,6 +1792,29 @@ kind: ConfigMap
 metadata:
   name: linkerd-config
   namespace: test-ns
+`,
+			},
+			expected: []string{
+				"cat1 'linkerd-config' config map exists",
+			},
+		},
+		{
+			checkDescription: "'linkerd-config' config map exists",
+			resources: []string{`
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: linkerd-config
+  namespace: test-ns
+data:
+  values: |-
+    tracing:
+      collector:
+        name: linkerd-collector
+      enabled: false
+      jaeger:
+        name: linkerd-jaeger
+      enabled: true
 `,
 			},
 			expected: []string{