Reorder code: Add support for attaching some warnings to the line above them

Using gdscript-formatter 0.14.0 via AUR
with Helix 25.07.1 with `formatter = { command = "gdscript-formatter", args = ["--reorder-code"] }` and `auto-format = true`

Dunno if it is related or was fixed with cf1c680.

Before:
```
extends Node

@warning_ignore_start("unused_signal")
signal signal1
signal signal2
@warning_ignore_restore("unused_signal")

func f1() -> void:
print("Hi!")
```

After:
```
extends Node

@warning_ignore_start("unused_signal")
signal signal1
signal signal2

@warning_ignore_restore("unused_signal")
func f1() -> void:
print("Hi!")
```

Expected behavior:

@warning_ignore_restore should stay at the same line.