refactor: Use explicit interface instead of os.File for drive backend

pkg/hardware/eject.go

@@ -8,5 +8,5 @@ import (
 func Eject(
 	state config.DriveConfig,
 ) error {
-	return mtio.EjectTape(state.Drive)
+	return mtio.EjectTape(state.Drive.Fd())
 }

pkg/hardware/tell.go

@@ -8,5 +8,5 @@ import (
 func Tell(
 	state config.DriveConfig,
 ) (int64, error) {
-	return mtio.GetCurrentRecordFromTape(state.Drive)
+	return mtio.GetCurrentRecordFromTape(state.Drive.Fd())
 }