feat(oonirun): add support for OONIRun v2 links (#844)

This diff adds support for OONIRun v2 links.

Part of https://github.com/ooni/probe/issues/2184.

internal/model/mocks/keyvaluestore.go

@@ -0,0 +1,20 @@
+package mocks
+
+import "github.com/ooni/probe-cli/v3/internal/model"
+
+// KeyValueStore allows mocking model.KeyValueStore.
+type KeyValueStore struct {
+	MockGet func(key string) (value []byte, err error)
+
+	MockSet func(key string, value []byte) (err error)
+}
+
+var _ model.KeyValueStore = &KeyValueStore{}
+
+func (kvs *KeyValueStore) Get(key string) (value []byte, err error) {
+	return kvs.MockGet(key)
+}
+
+func (kvs *KeyValueStore) Set(key string, value []byte) (err error) {
+	return kvs.MockSet(key, value)
+}

internal/model/mocks/keyvaluestore_test.go

@@ -0,0 +1,37 @@
+package mocks
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestKeyValueStore(t *testing.T) {
+	t.Run("Get", func(t *testing.T) {
+		expect := errors.New("mocked error")
+		kvs := &KeyValueStore{
+			MockGet: func(key string) (value []byte, err error) {
+				return nil, expect
+			},
+		}
+		out, err := kvs.Get("antani")
+		if !errors.Is(err, expect) {
+			t.Fatal("unexpected err", err)
+		}
+		if out != nil {
+			t.Fatal("unexpected out")
+		}
+	})
+
+	t.Run("Set", func(t *testing.T) {
+		expect := errors.New("mocked error")
+		kvs := &KeyValueStore{
+			MockSet: func(key string, value []byte) (err error) {
+				return expect
+			},
+		}
+		err := kvs.Set("antani", nil)
+		if !errors.Is(err, expect) {
+			t.Fatal("unexpected err", err)
+		}
+	})
+}