Extracting local variables and reconstructing causes conflicts with parameter names

[DongChunHao]

[provide a description of the issue]

Environment

Operating System: Windows11
JDK version: 17
Visual Studio Code version: 1.88
Java extension version: 1.29

Steps To Reproduce

1. select "5"
2. click “Refacator-Extract local variable”
3. new variable name " localVar"

public class Example {
public void method(int localVar) {
// extract variable: 5, rename localVar
System.out.println(5);
}
}

refactoring result:

public class Example {
public void method(int localVar) {
// extract variable: 5, rename localVar
int localVar = 5;
System.out.println(localVar);
}
}

Reason: When extracting local variables, there was no detection of naming conflicts between the new variable name and the context

Expected behavior: Check for naming conflicts before and after refactoring, and provide warning prompts

[rgrunber]

I would close this in favour of #3594 . It's a bit different, but someone investigating would probably be able to handle this along with that one.