Do not throw AssertionError in IRProcessor

Author: Akirathan

engine/runtime-parser-processor/src/main/java/org/enso/runtime/parser/processor/IRProcessor.java

@@ -167,7 +167,7 @@ private List<TypeElement> orderByReferences(Set<TypeElement> classesToProcess) {
                   classesToProcess.stream()
                       .filter(clazz -> clazz.getSimpleName().toString().equals(depName))
                       .findFirst()
-                      .orElseThrow(() -> new AssertionError("Class not found: " + depName));
+                      .orElseThrow(() -> new IRProcessingException("Class not found: " + depName, null));
               return depClazz;
             })
         .toList();