`targetName` annotation is not picked up when using `stubbed`

https://scastie.scala-lang.org/bUxsi5nPTi2Gm1o4SonRzQ

```scala
//> using dep io.github.kitlangton::stubby:0.1.2

import scala.annotation.*
import stubby.*

trait Foo {

@targetName("a1")
def a(i: Int): Unit

@targetName("a2")
def a(i: Int): Unit

}

stubbed[Foo] // Not OK
```

```
$ scala-cli a.sc
Compiling project (Scala 3.4.1, JVM (21))
[error] ./a.sc:16:1
[error] Double definition:
[error] def a(i: Int): Unit in class FooStubbed and
[error] def a(i: Int): Unit in class FooStubbed
[error] have the same type after erasure.
[error]
[error] Consider adding a @targetName annotation to one of the conflicting definitions
[error] for disambiguation.
[error] stubbed[Foo] // Not OK
[error] ^^^^^^^^^^^^
Error compiling project (Scala 3.4.1, JVM (21))
Compilation failed
```

Start with the linked Scala 3.4.1 reproduction and the stubbed[Foo] entry point. Trace how the two @targetName annotations are handled when generating FooStubbed. Done means the example compiles without the duplicate-definition error and both overloaded methods remain distinguishable.

Written by the indexing model from the issue text.