tests: channel shorts: dont fetch more pages

In some cases YouTube does not return a continuation response when fetching the *Shorts* channel tab.
There should be more research done about this issue, for the moment this part of the test is disabled.

codegen/src/abtest.rs

@@ -32,11 +32,7 @@ pub enum ABTest {
     ChannelPageHeader = 12,
 }
 
-const TESTS_TO_RUN: [ABTest; 3] = [
-    ABTest::TrendsVideoTab,
-    ABTest::TrendsPageHeaderRenderer,
-    ABTest::DiscographyPage,
-];
+const TESTS_TO_RUN: [ABTest; 1] = [ABTest::ChannelPageHeader];
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct ABTestRes {