`@static val`s on Scala.js are not initialized

## Compiler version

`3.4.0-RC1-bin-20240112-c50f2ff-NIGHTLY`

## Minimized code

```Scala
//> using scala 3.4.0-RC1-bin-20240112-c50f2ff-NIGHTLY
//> using platform js

import scala.annotation.static
class Foo
object Foo {
  @static val bar: String = "bar"

  @main def main() = println(bar)
}
```

## Output

```
undefined
```

## Expectation

```
bar
```