Disabled the failing tests.This will enabled after the #4683 in jdt.core (#2689)

Author: subyssurendran666

org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/hover/JavadocHoverTests.java

@@ -24,6 +24,7 @@
 
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 
@@ -160,6 +161,7 @@ public void testEnumWithAnonymousClass() throws Exception {
 		JavadocHover.getHoverInfo(elements, myEnumCu, new Region(range.getOffset(), range.getLength()), null);
 	}
 
+	@Ignore("Temporarily disabled due to https://github.com/eclipse-jdt/eclipse.jdt.core/issues/4683")
 	@Test
 	public void testCodeTagWithPre() throws Exception {
 		String source=
@@ -276,6 +278,7 @@ int check (String value, String[] strings) {
 	}
 
 	@Test
+	@Ignore("Temporarily disabled due to https://github.com/eclipse-jdt/eclipse.jdt.core/issues/4683")
 	public void testUnicode() throws Exception {
 		String source=
 				"""