[Issue 22682] `pragma(mangle)` does not work at local scope

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22682

--- Comment #1 from Basile-z <b2.temp at gmx.com> ---
A better test case, as in the first the final intention is a bit more complex.

```d
void main() 
{
    pragma(mangle, "main.v") 
    void v(){}
} 
```

--