gh-94512: Fix forced arg format in AC-processed resource

[arhadthedev]

Please note that this commit also removes an old way to express optional parameters (it prevented the new style generation):

 /*[clinic input]
 resource.prlimit

     pid: pid_t
     resource: int
-    [
-    limits: object
-    ]
+    limits: object = None
     /

[clinic start generated code]*/

I hope it breaks nothing.

• Issue: Fix forced arg format in AC-processed modules with custom converters #94512

[arhadthedev]

I have no idea why resource module doesn't build on Ubuntu (a CI log contains neither compiler error nor any mention of the module name).

The failure manifests itself as a later inability to load a non-existent module in python -m unittest -v test.test_resource.ResourceTest.test_prlimit.

Running Release|x64 interpreter...
Traceback (most recent call last):
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\test\support\import_helper.py", line 78, in import_module
    return importlib.import_module(name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1142, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'resource'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\unittest\__main__.py", line 18, in <module>
    main(module=None)
    ^^^^^^^^^^^^^^^^^
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\unittest\main.py", line 101, in __init__
    self.parseArgs(argv)
    ^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\unittest\main.py", line 150, in parseArgs
    self.createTests()
    ^^^^^^^^^^^^^^^^^^
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\unittest\main.py", line 161, in createTests
    self.test = self.testLoader.loadTestsFromNames(self.testNames,
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\unittest\loader.py", line 198, in loadTestsFromNames
    suites = [self.loadTestsFromName(name, module) for name in names]
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\unittest\loader.py", line 198, in <listcomp>
    suites = [self.loadTestsFromName(name, module) for name in names]
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\unittest\loader.py", line 132, in loadTestsFromName
    module = __import__(module_name)
             ^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\test\test_resource.py", line 9, in <module>
    resource = import_helper.import_module('resource')
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\oleg\Documents\dev\notmine\cpython\Lib\test\support\import_helper.py", line 82, in import_module
    raise unittest.SkipTest(str(msg))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
unittest.case.SkipTest: No module named 'resource'

[arhadthedev]

The bug is fixed.