Chore: Rename testdata plugin with a fully qualified name (#75104)

pkg/tests/api/plugins/api_plugins_test.go

@@ -145,14 +145,14 @@ func TestIntegrationPluginAssets(t *testing.T) {
 			{
 				desc:            "should return no-cache settings for Dev env",
 				env:             setting.Dev,
-				url:             "http://%s/public/plugins/testdata/img/testdata.svg",
+				url:             "http://%s/public/plugins/grafana-testdata-datasource/img/testdata.svg",
 				expStatus:       http.StatusOK,
 				expCacheControl: "max-age=0, must-revalidate, no-cache",
 			},
 			{
 				desc:            "should return cache settings for Prod env",
 				env:             setting.Prod,
-				url:             "http://%s/public/plugins/testdata/img/testdata.svg",
+				url:             "http://%s/public/plugins/grafana-testdata-datasource/img/testdata.svg",
 				expStatus:       http.StatusOK,
 				expCacheControl: "public, max-age=3600",
 			},