[Enhancement]: Cannot test a Type with the same name as the parsed type because of name overlapping

### Contact Details

_No response_

### What is the problem?

We cannot generate a Type with the same name as the parsed type because of name overlapping.

Ex.
```go
package main

type Human struct {
//+required
Firstname string
//+required
Lastname string
Age uint
}
```

Template
```
package main

type {{ .Type.InternalName }}) struct {}
```

if you want genz tests, you will have both `human.go` and `expected.go` in the same package, with the name `Human` overlapping

### What is the solution?

Quickfix https://github.com/Joffref/genz/tree/expected-in-dir

### Why is this important?

_No response_

### What are the alternatives?

to discuss

### What is the impact?

blocker for some cases

### Code of Conduct

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