[GR-39716] Reapply logic to deal with minitest vs test-unit gem differences

PullRequest: truffleruby/3428

Author: eregon

spec/tags/core/array/sample_spec.txt renamed to spec/tags/core/array/sample_tags.txt

@@ -280,7 +280,8 @@ def start_server(verify_mode: OpenSSL::SSL::VERIFY_NONE, start_immediately: true
             timeout = EnvUtil.apply_timeout_scale(30)
             th.join(timeout) or
               th.raise(RuntimeError, "[start_server] thread did not exit in #{timeout} secs")
-          rescue Test::Unit::PendedError
+          rescue (defined?(MiniTest::Skip) ? MiniTest::Skip : Test::Unit::PendedError)
+            # MiniTest::Skip is for the Ruby tree
             pend = $!
           rescue Exception
           end