Fix YT artist getSubscriberCount extraction

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMusicArtistInfoItemExtractor.java

@@ -1,5 +1,6 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
+import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
 import org.schabi.newpipe.extractor.Image;
 import org.schabi.newpipe.extractor.channel.ChannelInfoItemExtractor;
@@ -61,10 +62,14 @@ public class YoutubeMusicArtistInfoItemExtractor implements ChannelInfoItemExtra
 
     @Override
     public long getSubscriberCount() throws ParsingException {
-        final String subscriberCount = getTextFromObject(artistInfoItem.getArray("flexColumns")
-                .getObject(2)
+        final JsonArray flexColumns = artistInfoItem.getArray("flexColumns");
+        final JsonArray runs = flexColumns
+                .getObject(flexColumns.size() - 1)
                 .getObject("musicResponsiveListItemFlexColumnRenderer")
-                .getObject("text"));
+                .getObject("text")
+                .getArray("runs");
+        final String subscriberCount = runs.getObject(runs.size() - 1)
+                .getString("text");
         if (!isNullOrEmpty(subscriberCount)) {
             try {
                 return Utils.mixedNumberWordToLong(subscriberCount);

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/search/YoutubeMusicSearchExtractorTest.java

@@ -4,7 +4,6 @@ import static org.schabi.newpipe.extractor.ServiceList.YouTube;
 import static java.util.Collections.singletonList;
 
 import org.junit.jupiter.api.BeforeAll;
-import org.junit.jupiter.api.Disabled;
 import org.schabi.newpipe.downloader.DownloaderTestImpl;
 import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.NewPipe;
@@ -107,7 +106,6 @@ public class YoutubeMusicSearchExtractorTest {
         @Override public InfoItem.InfoType expectedInfoItemType() { return InfoItem.InfoType.PLAYLIST; }
     }
 
-    @Disabled
     public static class MusicArtists extends DefaultSearchExtractorTest {
         private static SearchExtractor extractor;
         private static final String QUERY = "kevin";