Fix local var cleanup to avoid method references (#1541)

- fix VarCleanUpCore visitor maybeUserVar() method to return false
  for a method reference initializer
- add new test to CleanUpTest11
- fixes #1524

org.eclipse.jdt.core.manipulation/common/org/eclipse/jdt/internal/ui/fix/VarCleanUpCore.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2020, 2023 Fabrice TIERCELIN and others.
+ * Copyright (c) 2020, 2024 Fabrice TIERCELIN and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -34,6 +34,7 @@
 import org.eclipse.jdt.core.dom.ClassInstanceCreation;
 import org.eclipse.jdt.core.dom.CompilationUnit;
 import org.eclipse.jdt.core.dom.Expression;
+import org.eclipse.jdt.core.dom.ExpressionMethodReference;
 import org.eclipse.jdt.core.dom.FieldDeclaration;
 import org.eclipse.jdt.core.dom.IMethodBinding;
 import org.eclipse.jdt.core.dom.ITypeBinding;
@@ -148,6 +149,9 @@ public boolean visit(final SingleVariableDeclaration node) {
 			}
 
 			private boolean maybeUseVar(final Type type, final Expression initializer, final int extraDimensions) {
+				if (initializer instanceof ExpressionMethodReference) {
+					return false;
+				}
 				if (type.isVar()
 						|| initializer == null
 						|| initializer.resolveTypeBinding() == null