HierarchicalASTVisitor update after JDT core API change

Fixes test fail `HierarchicalASTVisitor must be updated to reflect a
change in the ASTNode hierarchy. No method visit(EitherOrMultiPattern)
was found in HierarchicalASTVisitor.`

See eclipse-jdt/eclipse.jdt.core#2011

org.eclipse.jdt.core.manipulation/META-INF/MANIFEST.MF

@@ -3,7 +3,7 @@ Automatic-Module-Name: org.eclipse.jdt.core.manipulation
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.jdt.core.manipulation; singleton:=true
-Bundle-Version: 1.21.0.qualifier
+Bundle-Version: 1.21.100.qualifier
 Bundle-Vendor: %providerName
 Bundle-Activator: org.eclipse.jdt.internal.core.manipulation.JavaManipulationPlugin
 Bundle-Localization: plugin

org.eclipse.jdt.core.manipulation/core extension/org/eclipse/jdt/internal/corext/dom/HierarchicalASTVisitor.java

@@ -667,6 +667,16 @@ public void endVisit(Pattern node) {
 		endVisit((Expression)node);
 	}
 
+	@Override
+	public boolean visit(EitherOrMultiPattern node) {
+		return visit((Pattern) node);
+	}
+
+	@Override
+	public void endVisit(EitherOrMultiPattern node) {
+		endVisit((Pattern) node);
+	}
+
 	@Override
 	public boolean visit(ParenthesizedExpression node) {
 		return visit((Expression)node);