If exception occurs during setup, add to each test executed

Resolves #35835

If an exception occurs during `parallelize_setup` make sure to catch that exception and apply it to the result of each successive test run.  This results in marking all of the tests as failed to bring attention to the issue & ensure it is addressed before proceeding.

activesupport/lib/active_support/testing/parallelization.rb

@@ -71,7 +71,9 @@ def start
           fork do
             DRb.stop_service
 
-            after_fork(worker)
+            begin
+              after_fork(worker)
+            rescue => setup_exception; end
 
             queue = DRbObject.new_with_uri(@url)
 
@@ -83,6 +85,8 @@ def start
                 Minitest.run_one_method(klass, method)
               end
 
+              add_setup_exception(result, setup_exception) if setup_exception
+
               begin
                 queue.record(reporter, result)
               rescue DRb::DRbConnError
@@ -106,6 +110,11 @@ def shutdown
         @queue_size.times { @queue << nil }
         @pool.each { |pid| Process.waitpid pid }
       end
+
+      private
+        def add_setup_exception(result, setup_exception)
+          result.failures.prepend Minitest::UnexpectedError.new(setup_exception)
+        end
     end
   end
 end