Allow macro annotations to recover from suspension

Author: hamzaremmal

compiler/src/dotty/tools/dotc/transform/MacroAnnotations.scala

@@ -60,6 +60,8 @@ class MacroAnnotations:
               //       Replace this case with the nested cases.
               case ex0: InvocationTargetException =>
                 ex0.getCause match
+                  case ex: CompilationUnit.SuspendException =>
+                    throw ex
                   case ex: scala.quoted.runtime.StopMacroExpansion =>
                     if !ctx.reporter.hasErrors then
                       report.error("Macro expansion was aborted by the macro without any errors reported. Macros should issue errors to end-users when aborting a macro expansion with StopMacroExpansion.", annot.tree)