autocompletion for assigning variable [ALT + ENTER] does not work any more

### Apache NetBeans version

Apache NetBeans 28

### What happened

Autocompletion for assigning a variable to a given method automatically does not work anymore.
e.g.
given the line:
getGreeting();
pressing [ALT + ENTER] when positioning the cursor in getGreeting used to complete the code to:
String getgreeting= getGreeting();

Now nothing happens. I can't find another (new) way to complete the code.

### Language / Project Type / NetBeans Component

code completion

### How to reproduce

Type in a line with a method which is returning a value without assigning a variable to the return value.
position the cursor on the method, press [ALT + ENTER] ...

### Did this work correctly in an earlier version?

Apache NetBeans 25

### Operating System

Win11

### JDK

JDK 21

### Apache NetBeans packaging

Apache NetBeans binary zip

### Anything else

_No response_

### Are you willing to submit a pull request?

No

Reproduce in Apache NetBeans 28 with JDK 21 by typing a method call that returns a value and pressing Alt+Enter, then compare the behavior with NetBeans 25. Done means the action again offers or inserts an assignment for the returned value, such as assigning getGreeting() to a variable.

Written by the indexing model from the issue text.