wrap-static-fns generates too many consts

When running bindgen --experimental --wrap-static-fns ... on the following function

static inline int arch_within_stack_frames(const void * const stack,
					   const void * const stackend,
					   const void *obj, unsigned long len)
{
	return 0;
}

bindgen 0.69.5 generates the following C code in extern.c

int arch_within_stack_frames__extern(const const void *const stack, const const void *const stackend, const void *obj, unsigned long len) { return arch_within_stack_frames(stack, stackend, obj, len); }

Which then fails to build with the following error

rust/extern.c:1036:44: error: duplicate ‘const’ declaration specifier [-Werror=duplicate-decl-specifier]
 1036 | int arch_within_stack_frames__extern(const const void *const stack, const const void *const stackend, const void *obj, unsigned long len) { return arch_within_stack_frames(stack, stackend, obj, len); }
      |                                            ^~~~~
rust/extern.c:1036:75: error: duplicate ‘const’ declaration specifier [-Werror=duplicate-decl-specifier]
 1036 | int arch_within_stack_frames__extern(const const void *const stack, const const void *const stackend, const void *obj, unsigned long len) { return arch_within_stack_frames(stack, stackend, obj, len); }
      |                                                                           ^~~~~
cc1: all warnings being treated as errors

Start with bindgen --experimental --wrap-static-fns using the C function shown in the issue, then inspect the generated extern.c wrapper. Confirm the generated declaration contains duplicate const qualifiers; done means the wrapper no longer emits duplicate const declarations and the generated C builds without the reported error.