[FEA]: Add a `release()` method to `cuda.core.Buffer` to side-step the Python garbage collector

Is this a duplicate?

• I confirmed there appear to be no duplicate issues for this request and that I agree to the Code of Conduct

Area

cuda.core

Is your feature request related to a problem? Please describe.

@realarnavgoel brought up this issue offline that we currently have a fallback weak finalizer
https://github.com/NVIDIA/cuda-python/blob/d425a8895bd778fffb993263dbf5d9bc631fea22/cuda_core/cuda/core/experimental/_memory.py#L51
in case users forget to explicitly call .close() to free the memory. This could interfere with projects such as nvmath-python and nvSHMEM who require explicit control over the buffer lifetime and deallocation timing.

Describe the solution you'd like

We discussed offline and came up with this proposal that we'll add a .release() method to the buffer object. The idea is that if it is called, the weak finalizer will be unregistered, so that the only way to free the buffer is to call .close() explicitly later.

Describe alternatives you've considered

No response

Additional context

No response

フォールバックの弱いファイナライザが定義されている cuda_core/cuda/core/experimental/_memory.py の51行目付近から始め、Buffer オブジェクトの close パスがそれをどのように管理しているかを追ってください。release() がそのファイナライザの登録を解除し、close() が引き続きバッファを解放する明示的な方法である状態になれば作業は完了です。関連する動作について、近くにある Buffer の実装の詳細を確認してください。