test_io leaked [2, 2, 2] references, sum=6 on main branch

[kumaraditya303]

test.test_io.CTextIOWrapperTest.test_reconfigure_locale is leaking on main branch.

@kumaraditya303 ➜ /workspaces/cpython (io ✗) $ ./python -m test -R 3:3 test_io -m test_reconfigure_locale
0:00:00 load avg: 1.24 Run tests sequentially
0:00:00 load avg: 1.24 [1/1] test_io
beginning 6 repetitions
123456
......
test_io leaked [2, 2, 2] references, sum=6
test_io failed (reference leak)

== Tests result: FAILURE ==

1 test failed:
    test_io

Total duration: 314 ms
Tests result: FAILURE

[kumaraditya303]

See #94858

cc @pablogsal @corona10

[kumaraditya303]

Reproduced on 3.11 branch:

@kumaraditya303 ➜ /workspaces/cpython (3.11) $ ./python -m test -R 3:3 test_io -m test_reconfigure_locale
0:00:00 load avg: 15.27 Run tests sequentially
0:00:00 load avg: 15.27 [1/1] test_io
beginning 6 repetitions
123456
......
test_io leaked [2, 2, 2] references, sum=6
test_io failed (reference leak)

== Tests result: FAILURE ==

1 test failed:
    test_io

Total duration: 552 ms
Tests result: FAILURE

[kumaraditya303]

Fixed by #94858