viable/strict/1788510868: Rename the CUPTI monitor to Cuspy (#195881)

The in-process CUPTI activity collection engine behind torch.profiler's experimental backend is renamed from CUPTI monitor to Cuspy. No behavioral changes or new code paths accompany the rename. Other CUPTI-related names remain unchanged, including libcupti, cupti-python, CuptiError, cupti* API calls, and related catalogs and options.

The rename affects the in-process CUPTI activity collection engine used by torch.profiler's experimental backend. The component formerly known as the CUPTI monitor is now called Cuspy, with corresponding changes to file structures, modules, and pybind surfaces.

CuptiMonitor becomes Cuspy, and the surrounding CUPTI prefixes in C++ types, Python bindings, and configuration strings are updated accordingly. The old terms are retained only as deprecated aliases; the backend remains private and experimental, emphasizing a clean break from prior naming.

Source: Release notes from pytorch — https://github.com/pytorch/pytorch/releases/tag/viable%2Fstrict%2F1788510868