Plugins: Migrate PluginStore mock to pre-existing fakes package (#71664)

* migrate to existing fakes package

* fix imports

pkg/plugins/manager/fakes/fakes.go

@@ -432,3 +432,34 @@ type FakeOauthService struct {
 func (f *FakeOauthService) RegisterExternalService(ctx context.Context, name string, svc *plugindef.ExternalServiceRegistration) (*oauth.ExternalService, error) {
 	return f.Result, nil
 }
+
+type FakePluginStore struct {
+	PluginList []plugins.PluginDTO
+}
+
+func (pr *FakePluginStore) Plugin(_ context.Context, pluginID string) (plugins.PluginDTO, bool) {
+	for _, v := range pr.PluginList {
+		if v.ID == pluginID {
+			return v, true
+		}
+	}
+
+	return plugins.PluginDTO{}, false
+}
+
+func (pr *FakePluginStore) Plugins(_ context.Context, pluginTypes ...plugins.Type) []plugins.PluginDTO {
+	var result []plugins.PluginDTO
+	if len(pluginTypes) == 0 {
+		pluginTypes = plugins.PluginTypes
+	}
+
+	for _, v := range pr.PluginList {
+		for _, t := range pluginTypes {
+			if v.Type == t {
+				result = append(result, v)
+			}
+		}
+	}
+
+	return result
+}