Make borrow-state tests portable to 32-bit targets

The borrow-state tests assert exact values of the process-global borrow-flag count. On Debian i386, the no-feature test suite can observe an additional registered flag and fails with an assertion such as left: 2, right: 1, while the array-count and safety checks remain valid.

The exact n_flags assertions should either be made architecture-independent or limited to targets where the underlying registry behavior is deterministic. This was found while packaging rust-numpy 0.28.0 for Debian unstable.

A Debian-side patch currently gates the exact n_flags assertions to 64-bit targets while preserving the other borrow-state checks. The corresponding i386 build passes with that patch.

Inizia con i test di borrow-state e individua le asserzioni sul conteggio globale di n_flags del processo. Esegui la suite di test no-feature su una destinazione a 32 bit e confrontala con una destinazione a 64 bit, mantenendo intatti i controlli sul conteggio dell’array e sulla sicurezza. Il lavoro è completato quando i controlli del conteggio esatto non falliscono più a causa del comportamento del registro specifico dell’architettura.