gh-107603: AC only includes pycore_gc.h if needed

Argument Clinic now only includes pycore_gc.h if PyGC_Head is needed,
and only includes pycore_runtime.h if _Py_ID() is needed.

Add Py_ARGUMENT_CLINIC_AVOID_INTERNAL_CAPI macro to opt-out for the
internal C API in Argument Clinic.

The following extensions avoids the internal C API by defining the
macro Py_ARGUMENT_CLINIC_AVOID_INTERNAL_CAPI:

* Modules/_csv.c
* Modules/_multiprocessing/posixshmem.c
* Modules/_testcapi/exceptions.c
* Modules/_testinternalcapi.c
* Modules/_testmultiphase.c
* Modules/grpmodule.c
* Modules/syslogmodule.c

On Windows, the _testinternalcapi and _testmultiphase extensions are
built as shared extensions which cannot use the _Py_ID() API.
Accessing _PyRuntime members is not possible in a static
_PyArg_Parser variable, it's not a "constant".

Include/internal/pycore_global_strings.h

@@ -282,7 +282,6 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(argv)
         STRUCT_FOR_ID(as_integer_ratio)
         STRUCT_FOR_ID(asend)
-        STRUCT_FOR_ID(ast)
         STRUCT_FOR_ID(athrow)
         STRUCT_FOR_ID(attribute)
         STRUCT_FOR_ID(authorizer_callback)
@@ -347,8 +346,6 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(code)
         STRUCT_FOR_ID(command)
         STRUCT_FOR_ID(comment_factory)
-        STRUCT_FOR_ID(compile_mode)
-        STRUCT_FOR_ID(consts)
         STRUCT_FOR_ID(context)
         STRUCT_FOR_ID(contravariant)
         STRUCT_FOR_ID(cookie)
@@ -408,7 +405,6 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(extend)
         STRUCT_FOR_ID(extra_tokens)
         STRUCT_FOR_ID(f)
-        STRUCT_FOR_ID(facility)
         STRUCT_FOR_ID(factory)
         STRUCT_FOR_ID(false)
         STRUCT_FOR_ID(family)
@@ -460,8 +456,6 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(headers)
         STRUCT_FOR_ID(hi)
         STRUCT_FOR_ID(hook)
-        STRUCT_FOR_ID(id)
-        STRUCT_FOR_ID(ident)
         STRUCT_FOR_ID(ignore)
         STRUCT_FOR_ID(imag)
         STRUCT_FOR_ID(importlib)
@@ -479,7 +473,6 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(input)
         STRUCT_FOR_ID(insert_comments)
         STRUCT_FOR_ID(insert_pis)
-        STRUCT_FOR_ID(instructions)
         STRUCT_FOR_ID(intern)
         STRUCT_FOR_ID(intersection)
         STRUCT_FOR_ID(is_running)
@@ -524,7 +517,6 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(lo)
         STRUCT_FOR_ID(locale)
         STRUCT_FOR_ID(locals)
-        STRUCT_FOR_ID(logoption)
         STRUCT_FOR_ID(loop)
         STRUCT_FOR_ID(mapping)
         STRUCT_FOR_ID(match)
@@ -538,7 +530,6 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(memlimit)
         STRUCT_FOR_ID(message)
         STRUCT_FOR_ID(metaclass)
-        STRUCT_FOR_ID(metadata)
         STRUCT_FOR_ID(method)
         STRUCT_FOR_ID(mod)
         STRUCT_FOR_ID(mode)
@@ -560,11 +551,9 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(narg)
         STRUCT_FOR_ID(ndigits)
         STRUCT_FOR_ID(new_file_name)
-        STRUCT_FOR_ID(new_limit)
         STRUCT_FOR_ID(newline)
         STRUCT_FOR_ID(newlines)
         STRUCT_FOR_ID(next)
-        STRUCT_FOR_ID(nlocals)
         STRUCT_FOR_ID(node_depth)
         STRUCT_FOR_ID(node_offset)
         STRUCT_FOR_ID(ns)
@@ -720,7 +709,6 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(translate)
         STRUCT_FOR_ID(true)
         STRUCT_FOR_ID(truncate)
-        STRUCT_FOR_ID(twice)
         STRUCT_FOR_ID(txt)
         STRUCT_FOR_ID(type)
         STRUCT_FOR_ID(type_params)