Don't swallow exceptions in RuntimeServerTest

[JaroslavTulach]

Pull Request Description

While working on #6903 I realized that LinkageError from Compiler is silently swallowed by the RuntimeServerTest. Avoiding that by using TeeOutputStream and always printing out to stderr.

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• All code follows the
  Scala,
• All code has been tested:
  • Unit tests have been written where possible.

[JaroslavTulach]

Simulate the problem with:

enso.$ git diff engine/runtime/src/main/scala/org/enso/compiler/codegen/IrToTruffle.scala
diff --git engine/runtime/src/main/scala/org/enso/compiler/codegen/IrToTruffle.scala engine/runtime/src/main/scala/org/enso/compiler/codegen/IrToTruffle.scala
index 07e8422865..af067371cb 100644
--- engine/runtime/src/main/scala/org/enso/compiler/codegen/IrToTruffle.scala
+++ engine/runtime/src/main/scala/org/enso/compiler/codegen/IrToTruffle.scala
@@ -303,6 +303,7 @@ class IrToTruffle(
             new RuntimeAnnotation(annotation.name, closureRootNode)
           }
           if (!atomCons.isInitialized) {
+            if (true) throw new NoSuchMethodError()
             atomCons.initializeFields(
               language,
               makeSection(moduleScope, atomDefn.location),

and running the RuntimeServerTest.