test_int53 will sometimes timeout on wasm64

[sbc100]

e.g:

======================================================================
ERROR [0.003s]: test_int53 (test_core.wasm64)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/circleci/.pyenv/versions/3.10.7/lib/python3.10/unittest/case.py", line 59, in testPartExecutor
    yield
  File "/home/circleci/.pyenv/versions/3.10.7/lib/python3.10/unittest/case.py", line 591, in run
    self._callTestMethod(testMethod)
  File "/home/circleci/.pyenv/versions/3.10.7/lib/python3.10/unittest/case.py", line 549, in _callTestMethod
    method()
  File "/home/circleci/project/test/test_core.py", line 454, in test_int53
    self.do_core_test('test_int53.c', interleaved_output=False)
  File "/home/circleci/project/test/test_core.py", line 391, in do_core_test
    self.do_run_in_out_file_test(Path('core', testname), **kwargs)
  File "/home/circleci/project/test/common.py", line 1495, in do_run_in_out_file_test
    output = self._build_and_run(srcfile, expected, **kwargs)
  File "/home/circleci/project/test/common.py", line 1533, in _build_and_run
    js_output = self.run_js(js_file, engine, args,
  File "/home/circleci/project/test/common.py", line 1119, in run_js
    raise timeout_error
  File "/home/circleci/project/test/common.py", line 1086, in run_js
    jsrun.run_js(filename, engine, args,
  File "/home/circleci/project/test/jsrun.py", line 102, in run_js
    proc = subprocess.run(
  File "/home/circleci/.pyenv/versions/3.10.7/lib/python3.10/subprocess.py", line 503, in run
    stdout, stderr = process.communicate(input, timeout=timeout)
  File "/home/circleci/.pyenv/versions/3.10.7/lib/python3.10/subprocess.py", line 1152, in communicate
    stdout, stderr = self._communicate(input, endtime, timeout)
  File "/home/circleci/.pyenv/versions/3.10.7/lib/python3.10/subprocess.py", line 2029, in _communicate
    self.wait(timeout=self._remaining_time(endtime))
  File "/home/circleci/.pyenv/versions/3.10.7/lib/python3.10/subprocess.py", line 1207, in wait
    return self._wait(timeout=timeout)
  File "/home/circleci/.pyenv/versions/3.10.7/lib/python3.10/subprocess.py", line 1933, in _wait
    raise TimeoutExpired(self.args, timeout)
subprocess.TimeoutExpired: Command '['/home/circleci/node-v21.0.0-v8-canary20230822f5e30d0702-linux-x64/bin/node', '--stack-trace-limit=50', '--trace-uncaught', '--experimental-wasm-memory64', '/tmp/emtest_uk8qn2e5/emscripten_test_wasm64_w2010hu4/test_int53.js']' timed out after 299.9999734939993 seconds