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

* migrate to existing fakes package

* fix imports

pkg/api/datasources_test.go

@@ -15,7 +15,7 @@ import (
 	"github.com/grafana/grafana/pkg/api/routing"
 	"github.com/grafana/grafana/pkg/components/simplejson"
 	"github.com/grafana/grafana/pkg/infra/db/dbtest"
-	"github.com/grafana/grafana/pkg/plugins"
+	"github.com/grafana/grafana/pkg/plugins/manager/fakes"
 	ac "github.com/grafana/grafana/pkg/services/accesscontrol"
 	"github.com/grafana/grafana/pkg/services/accesscontrol/acimpl"
 	"github.com/grafana/grafana/pkg/services/accesscontrol/actest"
@@ -48,7 +48,7 @@ func TestDataSourcesProxy_userLoggedIn(t *testing.T) {
 		// handler func being tested
 		hs := &HTTPServer{
 			Cfg:         setting.NewCfg(),
-			pluginStore: &plugins.FakePluginStore{},
+			pluginStore: &fakes.FakePluginStore{},
 			DataSourcesService: &dataSourcesServiceMock{
 				expectedDatasources: ds,
 			},
@@ -72,7 +72,7 @@ func TestDataSourcesProxy_userLoggedIn(t *testing.T) {
 			// handler func being tested
 			hs := &HTTPServer{
 				Cfg:         setting.NewCfg(),
-				pluginStore: &plugins.FakePluginStore{},
+				pluginStore: &fakes.FakePluginStore{},
 			}
 			sc.handlerFunc = hs.DeleteDataSourceByName
 			sc.fakeReqWithParams("DELETE", sc.url, map[string]string{}).exec()