[ios][eg2] Disable all EG2 tests from SigninInteractionControllerTestCase.

TBR=jlebel@chromium.org

Bug: 1037676,1036840
Change-Id: I552d7cec1cab40b5ef9dae9271bb956a625fd71f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1981141Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727312}

ios/chrome/browser/ui/signin_interaction/signin_interaction_controller_egtest.mm

@@ -129,6 +129,13 @@ void ChooseImportOrKeepDataSepareteDialog(id<GREYMatcher> choiceButtonMatcher) {
 
 @implementation SigninInteractionControllerTestCase
 
+#if defined(CHROME_EARL_GREY_2)
++ (NSArray*)testInvocations {
+  // TODO(crbug.com/1037676): Fix and enable the tests for EG2.
+  return @[];
+}
+#endif
+
 - (void)setUp {
   [super setUp];
   // Remove closed tab history to make sure the sign-in promo is always visible