gh-118079: Fix requires_singlephase_init helper

[Eclips4]

Before this PR tests which decorated with a requires_singlephase_init helper simply did not run because of an incorrect call to the requires_gil_enabled helper.

• Issue: test_import raises a DeprecationWarning #118079

[Eclips4]

Before this pr:
Default debug build:

./python.exe -m test -v test_import -m test_disallowed_reimport
== CPython 3.13.0a6+ (heads/issue-118079:f6225f5075, Apr 19 2024, 09:10:18) [Clang 15.0.0 (clang-1500.1.0.2.5)]
== macOS-14.2.1-arm64-arm-64bit-Mach-O little-endian
== Python build: debug
== cwd: /Users/admin/Projects/cpython/build/test_python_worker_28793æ
== CPU count: 8
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

Using random seed: 2142684577
0:00:00 load avg: 6.36 Run 1 test sequentially
0:00:00 load avg: 6.36 [1/1] test_import
test_disallowed_reimport (test.test_import.SubinterpImportTests.test_disallowed_reimport) ... /Users/admin/Projects/cpython/Lib/unittest/case.py:707: DeprecationWarning: It is deprecated to return a value that is not None from a test case (<bound method _id of <test.test_import.SubinterpImportTests testMethod=test_disallowed_reimport>>)
  return self.run(*args, **kwds)
ok

----------------------------------------------------------------------
Ran 1 test in 0.002s

OK

== Tests result: SUCCESS ==

1 test OK.

Total duration: 390 ms
Total tests: run=1 (filtered)
Total test files: run=1/1 (filtered)
Result: SUCCESS

Debug free-threaded build:

./python.exe -m test -v test_import -m test_disallowed_reimport
== CPython 3.13.0a6+ (heads/issue-118079:f6225f5075, Apr 19 2024, 09:17:19) [Clang 15.0.0 (clang-1500.1.0.2.5)]
== macOS-14.2.1-arm64-arm-64bit-Mach-O little-endian
== Python build: free_threading debug
== cwd: /Users/admin/Projects/cpython/build/test_python_worker_36806æ
== CPU count: 8
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

Using random seed: 2535519029
0:00:00 load avg: 87.40 Run 1 test sequentially
0:00:00 load avg: 87.40 [1/1] test_import
test_disallowed_reimport (test.test_import.SubinterpImportTests.test_disallowed_reimport) ... skipped ''

----------------------------------------------------------------------
Ran 1 test in 0.000s

OK (skipped=1)

== Tests result: SUCCESS ==

1 test OK.

Total duration: 188 ms
Total tests: run=1 (filtered) skipped=1
Total test files: run=1/1 (filtered)
Result: SUCCESS

After this PR:

Default debug build:

./python.exe -m test -v test_import -m test_disallowed_reimport
== CPython 3.13.0a6+ (heads/issue-118079:f6225f5075, Apr 19 2024, 09:10:18) [Clang 15.0.0 (clang-1500.1.0.2.5)]
== macOS-14.2.1-arm64-arm-64bit-Mach-O little-endian
== Python build: debug
== cwd: /Users/admin/Projects/cpython/build/test_python_worker_28862æ
== CPU count: 8
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

Using random seed: 3757181916
0:00:00 load avg: 4.83 Run 1 test sequentially
0:00:00 load avg: 4.83 [1/1] test_import
test_disallowed_reimport (test.test_import.SubinterpImportTests.test_disallowed_reimport) ... ok

----------------------------------------------------------------------
Ran 1 test in 0.038s

OK

== Tests result: SUCCESS ==

1 test OK.

Total duration: 232 ms
Total tests: run=1 (filtered)
Total test files: run=1/1 (filtered)
Result: SUCCESS

Debug free-threaded build:

./python.exe -m test -v test_import -m test_disallowed_reimport
== CPython 3.13.0a6+ (heads/issue-118079:f6225f5075, Apr 19 2024, 09:17:19) [Clang 15.0.0 (clang-1500.1.0.2.5)]
== macOS-14.2.1-arm64-arm-64bit-Mach-O little-endian
== Python build: free_threading debug
== cwd: /Users/admin/Projects/cpython/build/test_python_worker_36855æ
== CPU count: 8
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

Using random seed: 2460420013
0:00:00 load avg: 38.83 Run 1 test sequentially
0:00:00 load avg: 38.83 [1/1] test_import
test_disallowed_reimport (test.test_import.SubinterpImportTests.test_disallowed_reimport) ... skipped 'gh-117694: free-threaded build does not currently support single-phase init modules in sub-interpreters'

----------------------------------------------------------------------
Ran 1 test in 0.001s

OK (skipped=1)

== Tests result: SUCCESS ==

1 test OK.

Total duration: 411 ms
Total tests: run=1 (filtered) skipped=1
Total test files: run=1/1 (filtered)
Result: SUCCESS

[sobolevn]

Thank you!

[colesbury]

Thanks!