gh-110300: Fix Refleaks in test_interpreters and test__xxinterpchannels

[ericsnowcurrently]

• Issue: test__xxinterpchannels leaks [21, 21, 21] references #110300

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @ericsnowcurrently for commit b291931 🤖

If you want to schedule another build, you need to add the 🔨 test-with-refleak-buildbots label again.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x RHEL7 LTO 3.x has failed when building commit 269005e.

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/402/builds/5555) and take a look at the build logs.
4. Check if the failure is related to this commit (269005e) 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/402/builds/5555

Failed tests:

• test_tools

Failed subtests:

• test_freeze_simple_script - test.test_tools.test_freeze.TestFreeze.test_freeze_simple_script

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z.lto/build/Lib/test/test_tools/test_freeze.py", line 33, in test_freeze_simple_script
    executable = helper.freeze(python, scriptfile, outdir)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z.lto/build/Tools/freeze/test/freeze.py", line 165, in freeze
    _run_quiet([MAKE, '-C', os.path.dirname(scriptfile)])
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z.lto/build/Tools/freeze/test/freeze.py", line 33, in _run_quiet
    return subprocess.run(
           ^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z.lto/build/Lib/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/usr/bin/make', '-C', '/tmp/test_python_abgk80sv/tmpomb679z8']' returned non-zero exit status 2.


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z.lto/build/Lib/test/test_tools/test_freeze.py", line 33, in test_freeze_simple_script
    executable = helper.freeze(python, scriptfile, outdir)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z.lto/build/Tools/freeze/test/freeze.py", line 165, in freeze
    _run_quiet([MAKE, '-C', os.path.dirname(scriptfile)])
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z.lto/build/Tools/freeze/test/freeze.py", line 33, in _run_quiet
    return subprocess.run(
           ^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z.lto/build/Lib/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/usr/bin/make', '-C', '/tmp/test_python_wd2pi5d7/tmpxc5n37vd']' returned non-zero exit status 2.