Regression: Fix repl after builtins reshuffle (#3435)

Debug is not imported by default (let me know if it should be?)

# Important Notes
When Debug was part of Builtins.enso everything was imported. Let me know if the new setup is not as expected.

engine/runner/src/main/scala/org/enso/runner/Main.scala

@@ -732,6 +732,7 @@ object Main {
     val mainMethodName = "internal_repl_entry_point___"
     val dummySourceToTriggerRepl =
       s"""from Standard.Base import all
+         |import Standard.Base.Runtime.Debug
          |
          |$mainMethodName = Debug.breakpoint
          |""".stripMargin