Simplify regrex for Windows junit tests, because all integration tests now pass or are ignored using assumption on Windows

(cherry picked from commit b4c090f)

Author: steve-s

mx.graalpython/mx_graalpython.py

@@ -1482,7 +1482,7 @@ def graalpython_gate_runner(args, tasks):
                         "--verbose",
                         "--no-leak-tests",
                         "--regex",
-                        r'((com\.oracle\.truffle\.tck\.tests)|(graal\.python\.test\.(integration\.)?(advanced\.Benchmark|advanced\.ResourcesTest|basic|builtin|decorator|generator|interop|util)))'
+                        r'((com\.oracle\.truffle\.tck\.tests)|(graal\.python\.test\.integration)|(graal\.python\.test\.(builtin|interop|util)))'
                     ],
                     report=True
                 )