Fix test_faulthandler for sanitizers

[vstinner]

Set environment options to ask sanitizers to not handle SIGSEGV.

This change allows running test_enable_fd() and test_enable_file() with sanitizers. Previously, they were skipped.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Fedora Stable LTO + PGO 3.x has failed when building commit 58f9c63.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/29/builds/4529) and take a look at the build logs.
4. Check if the failure is related to this commit (58f9c63) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/29/builds/4529

Summary of the results of the build (if available):

== Tests result: ENV CHANGED ==

431 tests OK.

10 slowest tests:

• test_concurrent_futures: 2 min 11 sec
• test_multiprocessing_spawn: 1 min 32 sec
• test_multiprocessing_forkserver: 1 min 11 sec
• test_multiprocessing_fork: 1 min 5 sec
• test_signal: 1 min 2 sec
• test_socket: 43.4 sec
• test_io: 37.5 sec
• test_imaplib: 30.3 sec
• test_subprocess: 29.5 sec
• test_xmlrpc: 27.8 sec

1 test altered the execution environment:
test_interpreters

15 tests skipped:
test.test_asyncio.test_windows_events
test.test_asyncio.test_windows_utils test_devpoll test_gdb
test_ioctl test_kqueue test_launcher test_startfile test_tkinter
test_ttk test_winconsoleio test_winreg test_winsound test_wmi
test_zipfile64

Total duration: 3 min 54 sec

Click to see traceback logs

Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-x86_64.lto-pgo/build/Lib/threading.py", line 1059, in _bootstrap_inner
    self.run()
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-x86_64.lto-pgo/build/Lib/threading.py", line 996, in run
    self._target(*self._args, **self._kwargs)
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-x86_64.lto-pgo/build/Lib/test/test_interpreters.py", line 481, in task
    interp = interpreters.create()
             ^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-x86_64.lto-pgo/build/Lib/test/support/interpreters.py", line 25, in create
    id = _interpreters.create(isolated=isolated)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: interpreter creation failed
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Traceback (most recent call last):
  File "<frozen importlib._bootstrap>", line 1266, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1237, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 841, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1000, in exec_module
  File "<frozen importlib._bootstrap_external>", line 1096, in get_code
  File "<frozen importlib._bootstrap_external>", line 1195, in get_data
TypeError: descriptor 'close' for '_io.BufferedReader' objects doesn't apply to a '_io.FileIO' object