Add versioning to gold endpoints (#66054)

packages/flutter_goldens/test/flutter_goldens_test.dart

@@ -398,7 +398,7 @@ void main() {
         MockHttpClientResponse mockHttpResponse;
 
         setUp(() {
-          url = Uri.parse('https://flutter-gold.skia.org/json/ignores');
+          url = Uri.parse('https://flutter-gold.skia.org/json/v1/ignores');
           mockHttpRequest = MockHttpClientRequest();
           mockHttpResponse = MockHttpClientResponse(utf8.encode(
             ignoreResponseTemplate(

packages/flutter_goldens/test/json_templates.dart

@@ -17,7 +17,7 @@ String authTemplate({
 }
 
 /// Json response template for Skia Gold ignore request:
-/// https://flutter-gold.skia.org/json/ignores
+/// https://flutter-gold.skia.org/json/v1/ignores
 String ignoreResponseTemplate({
   String pullRequestNumber = '0000',
   String testName = 'flutter.golden_test.1',

packages/flutter_goldens_client/lib/skia_client.dart

@@ -418,7 +418,7 @@ class SkiaGoldClient {
     final String traceID = getTraceID(testName);
     await io.HttpOverrides.runWithHttpOverrides<Future<void>>(() async {
       final Uri requestForExpectations = Uri.parse(
-        'https://flutter-gold.skia.org/json/latestpositivedigest/$traceID'
+        'https://flutter-gold.skia.org/json/v1/latestpositivedigest/$traceID'
       );
       late String rawResponse;
       try {
@@ -484,7 +484,7 @@ class SkiaGoldClient {
     late String rawResponse;
     await io.HttpOverrides.runWithHttpOverrides<Future<void>>(() async {
       final Uri requestForIgnores = Uri.parse(
-        'https://flutter-gold.skia.org/json/ignores'
+        'https://flutter-gold.skia.org/json/v1/ignores'
       );
 
       try {